Question

EXPERIMENT: AFFECT OF SOLUTION CONCENTRATION ON REACTION RATE

Do this experiment. WEAR GOGGLES

These supplies are needed:

•chalk crumbs or dust
•0.1 M HCl - see previous experiment
•clean test tubes (5)
•metric balance
•weighing paper
Follow these directions.

Use the following investigation to check a general rule for the rate of reaction. Before beginning, write a hypothesis stating what effect increasing the concentration of one of the reactants should have on the rate of the reaction. Design an investigation to be able to get timed data for this system. Start the timing as

Answer 1

I know I wore my goggles

The key reaction here is:
CaCO3 + 2 HCl → CaCl2 + H2CO3

I would recommend reading about le chatelier's principle

Answer 2

CaCl2 is water soluble
There is a dissociation reaction

H2CO3 → H2O + CO2

Note: CO2 is a gas

Answer 3

thank you ^-^