Required practical - Exothermic and endothermic reactions

Question 1

Method for required practical

Answer 1

1) Place the polystyrene cup inside the glass beaker to make it more stable.
2) Measure an appropriate volume of the solution (25cm)
3) Measure an appropriate mass of the solid, or select a suitable sized piece of metal.
4) Place the solution in a polystyrene cup.
5) Record the temperature of the solution.
6) Add the solid and record the highest or lowest temperature obtained.
7) Change your independent variable and repeat the experiment. Your independent variable could be the surface area of the solid,
or the type of acid being used, or the type of metal being used.

Question 2

What are the risks?

Answer 2

May irritate the skin or eyes

Dangerous to the environment