Sodium Thiosulfate and HCl Produce a Cloudy Precipitate

Question 1

These two chemicals are both…

Answer 1

Clear solutions

Question 2

What do they react together to form?

Answer 2

A yellow precipitate of Sulfur

Question 3

What does this experiment involve?

Answer 3

Watching a black mark disappear through the cloudy Sulfur and timing how long it takes to go

Question 4

What can the reaction be repeated for?

Answer 4

Solutions at different temps

Question 5

What is the best way to this accurately and safely?

Answer 5

Use a water bath to heat both solutions to the right temp before you mix them

Question 6

What must the depth of the liquid be?

Answer 6

Kept the same each time

Question 7

What will the result show?

Answer 7

The higher the temp the quicker the reaction and therefore the less time it takes for the mass to disappear

Question 8

What is the independent variable?

Answer 8

Temp

Question 9

What is the dependent variable?

Answer 9

Time taken for mark to disappear

Question 10

What are the typical results?

Answer 10

Temp: 20, 25, 30, 35, 40
Ttfmtp: 193, 151, 112, 87, 52

Question 11

What can this reaction also be used to test?

Answer 11

Test the effects of concentration

Question 12

What does this reaction not give?

Answer 12

Set of graphs