Honors Chemistry Bell Ringers Semester 2 2015 Fe

Honors Chemistry Bell Ringers Semester 2 2015

Fe, Mn, Cr & Ni Cation Lab Day! Have your Composition Notebook out for Labs Make the entry in the Table of Contents Name Period # Honors Chemistry Lab Book 1 Page Content 1 Table of Contents 2 Measurements Lab 3 -5 Separation of a Mixture 7 -9 Percentage of Water 11 -15 Flame Test Lab 17 -19 Group IA & IIA Cations 21 -24 Fe, Mn, Cr & Ni Cations Lab

Bell Ringer You will be continuing your lab on Fe, Mn, Cr and Ni Cation identification. BEFORE you can begin, your lab must be checked to ensure that it has the following parts: Questioning: Predicting: Procedure: (check for variables) Safety:

Bell Ringer This is your Unknown Identification portion of the lab on Fe, Mn, Cr and Ni Cation identification. Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

Bell Ringer This is your final day of the lab on Fe, Mn, Cr and Ni Cation identification. Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

Additional Questions What are names of the following compounds: 1) 2) 3) 4) 5) Na. OH Ni. Cl 2 Mn. Cl 3 Fe. Cl 2 Cr. Cl 3

Bell Ringer If a student is asked to convert 1. 75 atm into k. Pa and mm. Hg, is the student correct if they conclude that there are 177 k. Pa and 1300 mm. Hg? Justify your reasons…

Bell Ringer Some hydrogen gas is collected over water at 20. 0 degrees C. The levels of water inside and outside the gas-collection bottle are the same. The partial pressure of hydrogen is 742. 5 torr. What is the barometric pressure at the time the gas was collected? The answer is 760. 0 torr, write an explanation on how to calculate this pressure…

Bell Ringer Fill out the chart below in your Learning Log: Boyle’s Law V 1 = V 2 T 1 T 2 Gay-Lassac’s Law P 1 V 1 = P 2 V 2 T 1 T 2 Volume is directly proportion to n Ideal Gas Law

Bell Ringer The volume of a gas is 27. 5 ml at 22. 0 degrees C and 0. 947 atm. What will the volume be at 15. 0 degrees C and 0. 993 atm?

Bell Ringer Evaluate the following problem. Then determine if the answer provided is correct or incorrect. At STP, what is the volume of 7. 08 mol of Nitrogen gas? Proposed Answer: 142 L

Bell Ringer What volume of oxygen gas is needed to produce 0. 626 L of carbon dioxide gas? Assume all volume measurements are made at the same temperature and pressure. C 3 H 8 + O 2 CO 2 + H 2 O

Bell Ringer What pressure, in atm, is exerted by 0. 325 mol of hydrogen gas in 4. 08 L container at 35 degrees C?

Bell Ringer A gas sample occupies 8. 77 L at 20 degrees C. What is the pressure in atm, given that there are 1. 45 mol of gas in the sample?

Bell Ringer Finish each of the following statements: _______ Law states that if temperature decreases then volume decreases. ______ Law states that P 1 V 1=P 2 V 2 if the temperature remains constant ______ Law reduces Boyle’s, Charle’s, Gay-Lussac’s and Avogadro’s laws. ______ Law states that if volume increases then number of moles increases. _____ Law states that if the pressure increases then the volume decreases. _____ Law states that if volume is constant, pressure increases then temperature increases.

Bell Ringer Write your 8 solubility rules story into your Learning Log…

Bell Ringer What is the molarity of a solution composed of 5. 85 g of KI dissolved in enough water to make 0. 125 L of solution?

Bell Ringer What is the molality of acetone in a solution composed of 255 g of acetone, (CH 3)2 CO, dissolved in 200. g of water?

Bell Ringer Go back to your Bell Ringer for 2 -20…Translate the 8 solubility rule hints we practiced in class to what they actually stand for in chemistry.

Bell Ringer How many moles of H 2 SO 4 are present in 0. 500 L of a 0. 150 M H 2 SO 4 solution?

Bell Ringer Exam 11 & 12 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer Dissociation is the separation of ions that occurs when ionic compounds dissolve. How many moles of ions are contained in 1 L of a 1 M solution of KCl? Of Mg(NO 3)2? Why do covalent bonds not have dissociation?

Bell Ringer Identify the spectator ions in the reaction between KCl and Ag. NO 3 in an aqueous solution.

Bell Ringer Write the equation for the dissolution of each of the following in water, and then indicate the total number of moles of solute ions formed. a) 0. 50 mol strontium nitrate b) 0. 50 mol sodium phosphate

Bell Ringer Write the equation for the dissolution of each of the following in water, and then indicate the total number of moles of solute ions formed. a) 0. 50 mol strontium nitrate Sr(NO 3)2 Sr 2+ + 2 NO 31. 50 moles of ions b) 0. 50 mol sodium phosphate Na 3 PO 4 3 Na+ + PO 43 - 2. 0 moles of ions

Bell Ringer How does the presence of a nonvolatile solute affect each of the following properties of the solvent in which the solute is dissolved? a) Vapor pressure b) Freezing point c) Boiling point d) Osmotic pressure

Bell Ringer How does the presence of a nonvolatile solute affect each of the following properties of the solvent in which the solute is dissolved? a) Vapor pressure (Lowers) b) Freezing point (Lowers) c) Boiling point (Raises) d) Osmotic pressure (Increases)

Bell Ringer Compare the effects of the nonvolatile electrolytes with the effects of nonvolatile nonelectrolytes on the freezing and boiling points of solvents in which they are dissolved? Why are such differences observed?

Bell Ringer Compare the effects of the nonvolatile electrolytes with the effects of nonvolatile nonelectrolytes on the freezing and boiling points of solvents in which they are dissolved? A nonvolatile electrolyte will lower the freezing point or raise the boiling point more than a nonelectrolyte at the same concentration will. Why are such differences observed? One mole of a nonelectrolyte produces 1 mol of particles in solution. A mole of nonvolatile electrolyte produces more than 1 mol of ions in solution.

Hg, Ag, Zn, & Cu Cation Lab Day! Have your Composition Notebook out for Labs Make the entry in the Table of Contents Name Period # Honors Chemistry Lab Book 1 Page Content 1 Table of Contents 2 Measurements Lab 3 -5 Separation of a Mixture 7 -9 Percentage of Water 11 -15 Flame Test Lab 17 -19 Group IA & IIA Cations 21 -24 Fe, Mn, Cr & Ni Cations Lab 25 -29 Hg, Ag, Zn, Cu Cations Lab

Bell Ringer You will be continuing your lab on Hg, Ag, Zn and Cu Cation identification. BEFORE you can begin, your lab must be checked to ensure that it has the following parts: Questioning: Predicting: Procedure: (check for variables) Safety:

Bell Ringer This is your Unknown Identification portion of the lab on Hg, Ag, Zn, & Cu Cation identification. Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

Bell Ringer This is your final day of the lab on Hg, Ag, Zn, & Cu Cation identification. Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

HC Additional Question 1) Some cations are soluble in water and others are not. We can force them to become soluble/insoluble by adding either _______ or ______. This either makes a precip form or dissolves one. 2) What are the names of: HCl HNO 3 HOAC Na. OH 3) Which are acids and bases in question #2? 4) Why did it take a ton of Na. OH on the right side?

Bell Ringer Why does the actual freezing-point depression of an electrolytic solution differ from the freezing-point depression calculated on the basis of the concentration of particles?

Bell Ringer Why does the actual freezing-point depression of an electrolytic solution differ from the freezing-point depression calculated on the basis of the concentration of particles? The difference is caused by the attractive forces between the ions in the solution.

Bell Ringer Exam 13 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer Summarize the 5 characteristics of an acid and 5 characteristics of a base. ACTUALLY write them in your own words…you will need them later (see page 468 and 471).

Bell Ringer What are the similarities between a binary acid an oxyacid (look at their chemical formulas)?

Bell Ringer What is the difference between Bronsted-Lowry and Lewis acids/bases.

Bell Ringer Identify the conjugate acid and conjugate base in the equation below: HCl + H 20 H 3 O+ + Cl-

Titration Lab Day! Have your Composition Notebook out for Labs Make the entry in the Table of Contents Name Period # Honors Chemistry Lab Book 1 Page Content 1 Table of Contents 2 Measurements Lab 3 -5 Separation of a Mixture 7 -9 Percentage of Water 11 -15 Flame Test Lab 17 -19 Group IA & IIA Cations 21 -24 Fe, Mn, Cr & Ni Cations Lab 25 -29 Hg, Ag, Zn, Cu Cations Lab 31 -34 Titration Lab

Bell Ringer You will be continuing your lab on Titration. BEFORE you can begin, your lab must be checked to ensure that it has the following parts: Questioning: Predicting: Procedure: (check for variables) Safety:

Bell Ringer This is your final day for data collection. Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative & Quantitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

Additional Questions 1) When you added deionized water to the HCl solution in the Erlenmeyer flask before titrating, why did the addition of water not affect the results? 2) What characteristic of phenolphthalein made it appropriate to use in this titration? 3) Could you have done the experiment without it? 4) How does phenolphthalein’s end point relate to the equivelence point of reaction?

Bell Ringer You will need to follow your lab write up hand out to ensure that you will earn full points. You have today and tomorrow in the computer lab to complete your write up. You must have it submitted to Turnitin. com by Sunday night by midnight for full credit. Remember it tells me how much of your report is similar to others! This should be YOUR words!

Bell Ringer Identify water in each of the following reactions as a Bronsted-Lowry acid or Base: H 2 O + NH 3 = OH- + NH 4+ H 20 + HCl = H 3 O+ + Cl-

Bell Ringer Exam 14 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer Calculate the enthalpy change upon converting 1. 00 mol of ice at 25 C to steam at 125 C under a constant pressure of 1 atm. The specific heats of ice, liquid water, and steam are 2. 03 J/g-K, 4. 18 J/g-K, and 1. 84 J/g-K, respectively. For H 2 O, Hfus = 6. 01 k. J/mol and Hvap = 40. 67 k. J/mol.

Bell Ringer Write the formula using the ionization constant of water (Kw) and describe what each of the components mean.

Bell Ringer Determine the hydronium and hydroxide ion concentration in a solution that is 1 x 10 -4 M HCl.

Bell Ringer Continued

Bell Ringer If you were using the following formula…What are you trying to calculate: -log[OH-]= ? If a neutral solution at 25 C has a [OH-] of 1 x 10 -7 what is the p. OH?

Calcium Analysis Lab Day! Have your Composition Notebook out for Labs Make the entry in the Table of Contents Name Period # Honors Chemistry Lab Book 1 Page Content 1 Table of Contents 2 Measurements Lab 3 -5 Separation of a Mixture 7 -9 Percentage of Water 11 -15 Flame Test Lab 17 -19 Group IA & IIA Cations 21 -24 Fe, Mn, Cr & Ni Cations Lab 25 -29 Hg, Ag, Zn, Cu Cations Lab 31 -34 Titration Lab 35 -39 Calcium Analysis

Bell Ringer You will be continuing your lab on Calcium Analysis. BEFORE you can begin, your lab must be checked to ensure that it has the following parts: Questioning: Predicting: Procedure: (check for variables) Safety:

Bell Ringer This is your final day for data collection. Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative & Quantitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

Bell Ringer What is the concentration of hydronium ion in an aqueous solution that has a p. H of 3? If a student suggests the answer is -3…. Is this correct? Why or Why not?

Bell Ringer Continued… p. H = -log[H 3 O+] = -p. H [H 3 O+]= antilog (-p. H) [H 3 O+] = 1 x 10 -p. H [H 3 O+]= 1 x 10 -3

Bell Ringer Exam 15 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer Balance the following reaction: Zn + H 2 SO 4 Zn. SO 4 + H 2 Mg + O 2 Mg. O Ca. C 2 + H 2 O Ca(OH)2 + C 2 H 2 (CH 3)2 CHOH + O 2 H 2 O + CO 2 Cu. SO 4 5 H 2 O Cu. SO 4 + H 2 O

Bell Ringer What is the difference between temperature and heat?

Bell Ringer What is the difference between enthalpy change, enthalpy of reaction, enthalpy of formation, and enthalpy of combustion?

Bell Ringer What is the specific heat of a material if a 35 gram sample absorbed 96 J as it was heated from 293 K to 313 K?

Bell Ringer Calculate the energy needed to raise the temperature of 180. 0 g of water from 10. 0°C to 40. 0°C. The specific heat of water is 4. 18 J/(K g).

Bell Ringer Calculate the change in Gibbs free energy for the following equation at 25°C. 2 H 2 O 2(l) → 2 H 2 O(l) O 2(g) Given H= -196. 0 k. J/mol S = +125. 9 J/mol

Bell Ringer Exam 16 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Antacid Analysis Lab Day! Have your Composition Notebook out for Labs Make the entry in the Table of Contents Name Period # Honors Chemistry Lab Book 1 Page Content 1 Table of Contents 2 Measurements Lab 3 -5 Separation of a Mixture 7 -9 Percentage of Water 11 -15 Flame Test Lab 17 -19 Group IA & IIA Cations 21 -24 Fe, Mn, Cr & Ni Cations Lab 25 -29 Hg, Ag, Zn, Cu Cations Lab 31 -34 Titration Lab 35 -39 Calcium Analysis 41 -45 Antacid Analysis

Bell Ringer You will be continuing your lab on Antacid Analysis. BEFORE you can begin, your lab must be checked to ensure that it has the following parts: Questioning: Predicting: Procedure: (check for variables) Safety:

Bell Ringer Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative & Quantitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

Bell Ringer This is your final day for data collection. Be seated and ready for attendance before finishing your lab. Remember that your final sections should have the following parts: Data & Observations: Calculations & Results: Qualitative & Quantitative!!! Discussion of Results: Additional Questions: COMPLETE SENTENCES

Bell Ringer What is the collision theory? How is collision theory related to chemical reactions? Be ready to share…

Bell Ringer Be ready to do your presentations. Have your learning logs out ready to work on your sections.

Bell Ringer Name 3 factors that could effect reaction rate. Describe how increasing or decreasing them will change the rate.

Bell Ringer Exam 17 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer The equilibrim constant is symbolized with a K. Analyze the equation below and see if you can determine how K is calculated from a chemical equation. Note that I used = for double arrow. H 2 + I 2 = 2 HI K = [HI]2 [H 2][I 2]

Bell Ringer An equilibrium mixture of N 2, O 2 and NO gases at 1550 K is determined to be consist of 6. 6 x 10 -3 mol/L of N 2, 1. 6 x 10 -3 mol/L of O 2 , and 1. 3 x 10 -5 mol/L of NO. What is the equilibrium constant for the system at this temperature?

Bell Ringer Continued… N 2 + O 2 = 2 NO K = [NO]2 [N 2][O 2] K= (1. 3 x 10 -51. 6 mol/L)2 (6. 6 x 10 -3 mol/L) (1. 6 x 10 -3 mol/L) K= 1. 6 x 10 -5

Bell Ringer Exam 18 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer What are the similarities and differences between oxidation and reduction?

Bell Ringer What is the oxidation numbers assigned to NO 3 -?

Bell Ringer What is the oxidation numbers assigned to NO 3 -? Oxygen is -2 and the overall charge is -1 That means that 3 x -2 = -6 The N must only be +5 to leave remainder of -1

Bell Ringer In the following reactions, which element is being reduced? SO 2 + H 2 O H 2 SO 3 2 KNO 3 2 KNO 2 + O 2

Bell Ringer In the following reactions, which element is being reduced? SO 2 + H 2 O H 2 SO 3 Nothing is changing its charge so NOT Redox 2 KNO 3 2 KNO 2 + O 2 The oxygen is being oxidized to O 2 and the N (+5) is reduced to N (+3)

Bell Ringer How are oxidizing and reducing agents related to the vocabulary terms oxidation and reduction. There better be some REAL detail on this and don’t define a term with a term because in this case it is WRONG.

Bell Ringer Exam 19 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer Sketch a picture of the parts of an electrochemical cell and label their functions.

Bell Ringer What is the purpose of a salt bridge or porous cup in an electrochemical cell?

Bell Ringer What is the purpose of a salt bridge or porous cup in an electrochemical cell? To keep the half reactions balanced and not allow them to build up a charge on one side. This would stop the reaction early. The salt bridge allows the ions to pass.

Bell Ringer Describe the operation of voltaic cells. You should include similarities and differences between dry cells, leadacid batteries and fuel cells.

Bell Ringer Describe the process of electrolysis in the decomposition of water and in the production of metals.

Bell Ringer Exam 20 Please pick up your remote that is assigned to your name. You may use scratch paper in the test and a calculator (NO CELL PHONE). Please be ready for the exam to begin.

Bell Ringer Practice for the Final Day…No time to play. Be seated and ready for instructions.

District Exam Pick up your remote from the CPS bag. Be sure that it is YOUR number. Begin testing immediately. You may use: Paper to show your work and a Calculator. No Cell Phones!

Bell Ringer Day 1 of 4 for our Calorimeter Lab You will use a hand out to begin writing up our Lab Log entry. I. Procedures…detailed by simplified (should have prediction prior to starting) II. Safety-MSDS is a good resource III. Data/Observation Table ready for collection IN PEN…Partners are fine to this point

Lab Day 2 of 4 Data Collection Before you can begin collecting data…you must have your lab book entry preapproved. I. Procedures-short and sweet but shouldn’t need the manual to know how to do the lab. WITH A Prediction! II. Safety section for chemicals and equipment we are using. MSDS is your BFF. III. Data/Observations (begin after approval)

Lab Day 3 of 4 Final Day for Calorimeter Data Collection! Remember a full lab report includes: Intro, Procedures, Safety, Data & Observations, Calculations & Results (excel graphs etc), Discussion of Results, References in ACS and Additional Questions. You will be submitting all 8 sections to me on Tuesday after the break. Paper copy submission please… No 3 rd Person! Individual work!

Lab Day 4 of 4 Final Day for Calorimeter Data Collection! Remember a full lab report includes: Intro, Procedures, Safety, Data & Observations, Calculations & Results (excel graphs etc), Discussion of Results, References in ACS and Additional Questions. You will be submitting all 8 sections to me on Tuesday after the break. Paper copy submission please… No 3 rd Person! Individual work!

Bell Ringer

Finals Bell Ringer Pick up your remote, take out your calculator (no cell phones) & scratch paper. No personal periodic tables but the one in our test booklet or on the wall is fair game. Your grade is based on number correct so it is to your best interest to answer every question.