CHAPTER 5 Reactions in Aqueous Solution Turn in

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CHAPTER 5 Reactions in Aqueous Solution Turn in homework for Chapter 4 1 Chem

CHAPTER 5 Reactions in Aqueous Solution Turn in homework for Chapter 4 1 Chem 105 Chpt 4 Lsn 11

l Where Road Map we were l Chemical equations and chemical analysis review problems

l Where Road Map we were l Chemical equations and chemical analysis review problems l Where we are going l Critical skills: naming common ions, writing electrically neutral formulas/reactions, stoichiometric conversions l Types of reactions l Use: Figure 5. 3, page 179 l Know: Table 5. 2, pg 182 Chem 105 Chpt 4 Lsn 11 2

5. 2 Precipitation reactions Writing Equations for Aqueous Ionic Reactions l Three types of

5. 2 Precipitation reactions Writing Equations for Aqueous Ionic Reactions l Three types of equations are used to represent aqueous ionic reactions: molecular, total ionic, and net ionic equations. l molecular equation: shows all reactants and products as if they were intact, undissociated l total ionic equation: shows all the soluble ionic substances dissociated into ions. Charges must balance l Spectator ions not involved in chemical change. l net ionic equation: it eliminates the spectator ions and shows the actual chemical change taking place. 3 Chem 105 Chpt 4 Lsn 11

Practice Problem 10 -1 l molecular equation Pb(NO 3)2(aq) + K 2 Cr. O

Practice Problem 10 -1 l molecular equation Pb(NO 3)2(aq) + K 2 Cr. O 4(aq) → Pb. Cr. O 4(s) + 2 KNO 3(aq) l Write the Total Ionic and Net Ionic equations for l Total l l Net 4 Chem 105 Chpt 4 Lsn 11

Practice Problem 10 -2 l Write the Total Ionic and Net Ionic equations for

Practice Problem 10 -2 l Write the Total Ionic and Net Ionic equations for Ca. Cl 2(aq) + Na 2 CO 3(aq) → Ca. CO 3(s) + 2 Na. Cl(aq) 5 Chem 105 Chpt 4 Lsn 11

Practice Problem 10 -3 l Solutions of iron (III) chloride and potassium hydroxide give

Practice Problem 10 -3 l Solutions of iron (III) chloride and potassium hydroxide give iron (III) hydroxide and potassium chloride when combined. l Write the l Molecular equation l Total ionic equation l Net ionic equation 6 Chem 105 Chpt 4 Lsn 11

5. 3 – Acids and Bases (know table 5. 2) l Acid: increases the

5. 3 – Acids and Bases (know table 5. 2) l Acid: increases the H+ concentration l Base: increases the OH- concentration l Strong acid: completely dissociates/ionizes l Weak acid: partial ionization 7 Chem 105 Chpt 4 Lsn 11

5. 4 - Reactions of Acids and Bases l An Acid reacting with a

5. 4 - Reactions of Acids and Bases l An Acid reacting with a base produce a salt and water l Neutralization reaction: a strong acid with a strong base 8 Chem 105 Chpt 4 Lsn 11

Practice Problem 10 - 4 l Calcium chloride and potassium phosphate combine to form

Practice Problem 10 - 4 l Calcium chloride and potassium phosphate combine to form calcium phosphate and potassium chloride. l Write the molecular equation 3 Ca. Cl 2(aq) + 2 K 3 PO 4(aq) → Ca 3 PO 4(s) + 6 KCl(aq) l Write the Total Ionic and Net Ionic equations 9 Chem 105 Chpt 4 Lsn 11

3 Ca. Cl 2(aq) + 2 K 3 PO 4(aq) → Ca 3 PO

3 Ca. Cl 2(aq) + 2 K 3 PO 4(aq) → Ca 3 PO 4(s) + 6 KCl(aq) l Write the Total Ionic and Net Ionic equations l Combining 5 grams Ca. Cl 2 with 3. 5 grams of K 3 PO 4 produced only a 67% yield of KCl. l What is the limiting reactant? l What mass of product did you make? 10 Chem 105 Chpt 4 Lsn 11

5. 8 Measuring Concentrations l How many moles of each ion are in each

5. 8 Measuring Concentrations l How many moles of each ion are in each solution? (a) 2 mol of potassium perchlorate dissolved in water (b) 354 g of magnesium acetate dissolved in water (c) 1. 88 x 1024 formula units of ammonium chromate dissolved in water (d) 1. 32 L of 0. 55 M sodium bisulfate 11 Chem 105 Chpt 4 Lsn 11

5. 8 Measuring Concentrations l How many moles of H+(aq) are present in 451

5. 8 Measuring Concentrations l How many moles of H+(aq) are present in 451 m. L of 3. 20 M hydrobromic acid? 12 Chem 105 Chpt 4 Lsn 11

5. 4 Acid-Base Reactions: Acid-Base Titrations l What volume of 0. 1292 M Ba(OH)2

5. 4 Acid-Base Reactions: Acid-Base Titrations l What volume of 0. 1292 M Ba(OH)2 would neutralize 50. 00 m. L of the HCl solution standardized in the preceding sample problem (4. 5) ? 13 Chem 105 Chpt 4 Lsn 11

Precipitation Reactions: Predicting Whether a Precipitate Will Form l Predict whether a reaction occurs,

Precipitation Reactions: Predicting Whether a Precipitate Will Form l Predict whether a reaction occurs, and write balanced total and net ionic equations. (a) iron(III) chloride(aq) + cesium phosphate(aq) → (b) sodium hydroxide(aq) + cadmium nitrate(aq) → (c) magnesium bromide(aq) + potassium acetate(aq) → (d) silver sulfate(aq) + barium chloride(aq) → 14 Chem 105 Chpt 4 Lsn 11

Next Lesson l Chapter 5 l Gas forming reactions l Classifying reactions l Oxidation

Next Lesson l Chapter 5 l Gas forming reactions l Classifying reactions l Oxidation reactions l Measuring concentrations of compounds in solution l p. H l Stoichiometry of reactions in aqueous solution 15 Chem 105 Chpt 4 Lsn 11

Practice Problem 10 - 5 l Write the Total Ionic and Net Ionic equations

Practice Problem 10 - 5 l Write the Total Ionic and Net Ionic equations for Zn(s) + H 2 SO 4(aq) → Zn. SO 4(aq) + H 2(g) 16 Chem 105 Chpt 4 Lsn 11

Practice Problem 10 -6 l Write the Total Ionic and Net Ionic equations for

Practice Problem 10 -6 l Write the Total Ionic and Net Ionic equations for HCl(aq) + Na. OH(aq) → Na. Cl(aq) + H 2 O(l) 17 Chem 105 Chpt 4 Lsn 11