Question

Write a procedure that you would follow to demonstrate the effect of increasingly higher concentrations of hydrochloric acid on its rate of reaction with antacid tablets.

Answer 1

Did I do it right?

49)a)
Step 1: If you haven't done so wear protective clothing, safety gloves and safety goggles

Step 2: Label three 100mL beakers numbered 1,2,3

Step 3:Crush some antacid tablets into fine powder, using the mortar and pestle

Step 4:Using the electronic balance measure out 0.5g of powdered antacid. Place the measuring pan on the balance and use the scoop to add the antacid power.

Step 5: Add 37.5ml of distilled water and using the 100mL graduated cylinder measure 12.5ml of 1.0 mol/L hydrochloric acid solution into beaker 1.

Step 6: Place beaker 1 in an ice bath for two minutes, pour all of the antacid powder from the measuring pan into the beaker, and start the timing device, observe the reaction, and turn off the timer when the reaction is complete

Step 7: Measure out a second 0.5g sample of powdered antacid.

Step 8: Add 25.0ml of distilled water and using the 100mL graduated cylinder measure 25.0ml of 1.0 mol/L hydrochloric acid solution into beaker 2.

Step 9: Place beaker 2 in an ice bath for two minutes, pour all of the antacid powder from the measuring pan into the beaker, and start the timing device, observe the reaction, and turn off the timer when the reaction is complete

Step 10: Measure out another 0.5g sample of powdered antacid.

Step11: Using the 100mL graduated cylinder measure 50ml of 1.0 mol/L hydrochloric acid solution into beaker 3.

Step 12: : Place beaker 3 in an ice bath for two minutes, pour all of the antacid powder from the measuring pan into the beaker, and start the timing device, observe the reaction, and turn off the timer when the reaction is complete

Step 13: Record all observations and times in the observation table

b)
H2O (mL) 37.5mL 25mL 0mL
Description of the reaction(s)
Time to complete reaction(s)

c)The three safety procedures that needs to be followed are:

1)Hydrocloric acid is corrosive and emits strong fumes. Wear safety goggles, safety gloves, and protective clothing at all times

2)Always add acid to water. Adding water to a concentrated acid can cause splattering. Diluting acid produces heat. Because we want the only variable to be concentration, we need to make sure that they all the same initial temperature. Therefore mix the acid solutions ahead of time and allow the test tubes to cool to room temperature before proceeding.

3)When working with concentrated acids, one should work under a fume hood.

d)The controls used are the amount of HCI, amount of water, and the time

Answer 2

revised:
d) The controls used are the concentration of HCl, amount of water, and the amount of anatacid tablets.