# Calculating Rate of Reaction Calculating Rate Recall rate

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Calculating Rate of Reaction

Calculating Rate: ¡ ¡ Recall, rate is the something over time change You can calculate rate if: 1. Given info 2. Given a set of Data 3. Given a Graph in

A bottle of wine contains approximately 72 g of ethyl alcohol, C 2 H 5 OH. When left open, the ethyl alcohol changes into acetic acid according to the following equation: C 2 H 5 OH + O 2 CH 3 COOH + H 2 O The ethyl alcohol changed completely into acetic acid after 60 days (d). What is the average reaction rate, in moles per day (mol/d), of the transformation of the alcohol?

Calculate the number of moles of alcohol (using molar mass). moles = 72/ 46 moles = 1. 57 mol of alc. Calculate the average rate: Rate = 1. 57 / 60 Rate = 0. 026 mol/day

Below is a balanced equation: A + B C + 2 D A student dissolved 0. 15 mol of substance A in solution B. After a ten-minute period of reaction, 0. 05 mol of A is recovered. What is the average rate of formation of D in mol/sec?

Calculate the number of moles of A used in rxn: Moles used of A = 0. 15 – 0. 05 moles of A used = 0. 1 mol Calculate the number of moles of D produced: moles of D produced = 0. 2 mol

Calculate the length of rxn: 10 min = ? sec time = 600 sec Calculate the average rate: Rate = 0. 2 / 600 Rate =3. 3 x 10 -4 mol/sec

The combustion of a candle is recorded in the table below. Mass of candle (g) Time (h: min) Before combustion 165. 5 After combustion 162. 0 1: 00 6: 00 The equation is: C 25 H 52 + 38 O 2 25 CO 2 + 26 H 2 O Calculate the rate of this combustion reaction in moles/hour

Calculate the # moles burned: moles = 3. 5/ 352 moles = 0. 01 mol of candle burned Calculate the average rate: Rate = 0. 01 / 5 Rate = 0. 002 mol/hr are burned

Given: A(g) + B(g) C(g) The graph below shows the # of moles of C formed by the reaction, as a function of time. What is the average rate for the formation of C during the first three seconds?

Calculate the # C moles formed in first 3 seconds: moles = 0. 25 mol of C formed Calculate the average rate of C: Rate = 0. 25 / 3 Rate = 0. 083 mol/s of C are formed

Magnesium reacted with HCl, to produce H 2 & Mg. Cl 2. The following table shows the volume of H 2 formed during the reaction as a function of time. Time (s) Volume of H 2 (m. L) 0 10 50 100 150 0 8 32 45 50 What is the average rate of formation of H 2 between the 25 th and 75 th second?

Vol of H 2 = 39 m. L – 19 m. L Vol of H 2 = 20 m. L Rate = 20 / 50 19 m. L of H 2 39 m. L of H 2 Rate = 0. 40 m. L/s