Question
Write a procedure to demonstrate the effect of higher concentrations of HCl on its rate of reaction with antacid tablets. I have HCl with a concentration of 1.0 mol/L.
This is what I have so far. Are my concentrations correct for this procedure? E is my control and, a,b,c,d respectively represent 100%,75%.50% and 25%.
Step 1: Add 20 mL of water to beaker a. Add 15 mL of distilled water to beaker b. Add 10 mL of distilled water to beaker c. Add 5 mL of distilled water to beaker d. Don’t add any water to beaker e.
Step 2: Measure 20.0 mL of 1.0mol/L hydrochloric acid solution, then, add the solution to beaker a. Repeat this step for the remainder of the five beakers.
This is what I have so far. Are my concentrations correct for this procedure? E is my control and, a,b,c,d respectively represent 100%,75%.50% and 25%.
Step 1: Add 20 mL of water to beaker a. Add 15 mL of distilled water to beaker b. Add 10 mL of distilled water to beaker c. Add 5 mL of distilled water to beaker d. Don’t add any water to beaker e.
Step 2: Measure 20.0 mL of 1.0mol/L hydrochloric acid solution, then, add the solution to beaker a. Repeat this step for the remainder of the five beakers.
Answers
DrBob222
.......a.....b....c....d....e.
mL H2O.20....15...10...5....0
mL acid.20...20...20..20....20
total V..40..35...30..25...20
From your description it appears to me that the concentrations are as follows:
a. 1.0 M x (20/40) = 0.5 M
b. 1.0 M x (20/35) = 0.57 M
c. 1.0 M x (20/30) = 0.67 M
etc. with e being 1.0 M x 20/20 = 1.0 M.
mL H2O.20....15...10...5....0
mL acid.20...20...20..20....20
total V..40..35...30..25...20
From your description it appears to me that the concentrations are as follows:
a. 1.0 M x (20/40) = 0.5 M
b. 1.0 M x (20/35) = 0.57 M
c. 1.0 M x (20/30) = 0.67 M
etc. with e being 1.0 M x 20/20 = 1.0 M.