# Chemistry/Factors That Affect Reaction Rates Prep

PREPARATION PROCEDURE FOR
CHEM 12 : FACTORS AFFECTING REACTION RATES

For one class of 24 students (12 pairs):

CHEMICALS:

CHEMICAL PREPARATION PROCEDURE
500 mL 0.100 M Na2S2O3 Dissolve 12.41 g of Na2S2O3•5H2O (sodium thiosulphate) and dilute to exactly 500 mL.
250 mL 0.100 M HCl Dilute 2.15 mL of concentrated hydrochloric acid to exactly 250 mL.
250 mL of 1.5 M HCl Dilute 32.3 mL of concentrated hydrochloric acid to exactly 250 mL.
250 mL of 2.5 M HCl Dilute 53.8 mL of concentrated hydrochloric acid to exactly 250 mL.
250 mL of 3.5 M HCl Dilute 75.3 mL of concentrated hydrochloric acid to exactly 250 mL.
250 mL of 4.5 M HCl Dilute 96.8 mL of concentrated hydrochloric acid to exactly 250 mL.
500 mL of 3 M HCl Dilute 129 mL of concentrated hydrochloric acid to exactly 500 mL.
1 L of 6 M HCl Dilute 516 mL of concentrated hydrochloric acid to exactly 1000 mL.
500 mL of 3 M H2SO4 Carefully and slowly add 84 mL of concentrated sulphuric acid to a 500¬mL volumetric flask containing 250 mL of distilled water. Allow to cool or force–cool under cold water tap and dilute to exactly 500 mL
500 mL of 6 M HNO3 Dilute 195 mL of concentrated nitric acid to exactly 500 mL
500 mL of 6 M H3PO4 Dilute 205 mL of concentrated phosphoric acid to exactly 500 mL
100 mL of 1 M H2SO4 CAREFULLY add 5.6 mL of concentrated sulphuric acid to about 50¬mL of water and dilute to exactly 100 mL.
250 mL of 0.1 M K2C2O4 4.61 g of potassium oxalate, K2C2O4•H2O, diluted to exactly 250 mL.