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.

.......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.

Based on the objective of comparing the effect of higher concentrations of HCl on the rate of reaction with antacid tablets, the procedure you have outlined seems to be on the right track. However, there are a few adjustments and clarifications that can be made:

1. Clarify the purpose of the experiment: Clearly state that the objective is to determine how the concentration of HCl affects the rate of reaction with antacid tablets.

2. Specify the concentration for each beaker: Based on your description, it seems like you intend to have different concentrations of HCl in each beaker (a, b, c, d, and e). However, you haven't mentioned the actual concentrations. To demonstrate the effect of higher concentrations, you should increase the concentration gradually. For example, you could use 1.0M, 0.75M, 0.50M, 0.25M, and 0.0M (water, control) solutions.

3. Use consistent volume for each beaker: Instead of adding different volumes of water to different beakers, it would be more consistent to keep the volume of each beaker constant. For example, you could use 20 mL of each HCl solution in each beaker.

4. Label the beakers clearly: Make sure to label each beaker clearly to avoid confusion during the experiment.

Taking these adjustments into account, here's an improved version of the procedure:

Step 1: Label five beakers as a, b, c, d, and e.

Step 2: Add 20 mL of the respective HCl solution to each labeled beaker: a (1.0M HCl), b (0.75M HCl), c (0.50M HCl), d (0.25M HCl), and e (0.0M HCl, water, control).

Step 3: Drop one antacid tablet into each beaker. Make sure all tablets are the same brand and size for accurate comparisons.

Step 4: Observe and record the reaction rate of each beaker. You can measure the reaction rate by observing the time it takes for the tablet to dissolve or by measuring the amount of gas released using a gas syringe.

Step 5: Analyze and compare the results, noting any trends or differences in reaction rates with increasing concentrations of HCl.

Remember to follow all necessary safety precautions while handling acids and chemicals. Also, note that this is just a general outline, and you may need to make further adjustments based on the specific requirements of your experiment and available equipment.