REQUIRED PRACTICAL - adding hydrochloride acid to sodium hydroxide.

Question 1

Describe the shape of the graph/correlation for volume hydrochloride acid in comparison to temperature rise.

Answer 1

It increases and then drops. The highest temperature rise is at 25 cm*3 and the rise is 6.8 degrees Celsius.

Question 2

What did nothing happen to the temp to begin with?

Answer 2

There are not enough H+ ions to react with the OH- ions.

Question 3

When is heat given out?

Answer 3

Every time a H+ ion reacts with an OH- ions.

Question 4

What happens as more acid is added?

Answer 4

There are more H+ so more reaction occurs, giving out more heat energy.

Question 5

What happens at the maximum temperature?

Answer 5

There are the same amount of H+ ions as OH- ions.

Question 6

Why does the temperature start to decrease?

Answer 6

There are no OH- ions for the H+ ions to react with.