How would each of the following effect the results of the experiment. Be specific. Effect of the theremometer reading 0.5 C lower b.

Hi need help with these questions!

4. How would each of the following effect the results of the experiment. Be specific. 

a. Effect of the theremometer reading 0.5 ºC lower

b. HCl concentration being 2% lower than you think it is

5. A student wishes to conduct this investigation more quickly and decides to perform the activities using three calorimeters. What portion of the investigation would need to be modified to account for three separate calorimeters being used?