Mesuring Rates Using Experiments

Question 1

If the product we are measuring is a gas what are the two methods we could use ?

Answer 1

Mass loss method with a conical flask and scales
Or
Measuring the gas collected in a measuring cylinder

Question 2

How could we more accurately measure the amount of gas produced ?

Answer 2

By using a gas syringe, conical flaks and the mixture
It’s more accurate as it can show us exactly how much gas had been produced

Question 3

If the product is a solid what is the method we use ?

Answer 3

The precipitation method- a solid is forming
Cross drawn on paper and wait to see the cross disappear

Question 4

What are the 8 steps been doing the precipitation method ?

Answer 4

Measure volume of sodium thiosulfate
Place sodium thiosulfate in conical flask
Place on cross
Measure volume of hydrochloric acid
Add to that to conical flake
Swirl
Start stop lock
Measure time for lock to become no longer visible

Question 5

What is the independent variable for that reaction ?

Answer 5

Amount of sodium thiososolfate

Question 6

What is the dependent variable ?

Answer 6

The time for the cross to become not visible

Question 7

What are four control variables ?

Answer 7

Thickness of cross
Concentration of Hydrocloric acid
Volume of hydrochloric acid
Volume of Sodium Thiosolfate