Question

in parts 2, 3 and 4 of this lab, you will be conducting calorimetry experiments on neutralization reactions in solution.
two solutions (each of volume 2.5 ml) will be mixed together to initiate the reaction.
what mass of water should be used in the calculation of the heat energy absorbed by the calorimeter?
2.5 g
5.0 g (since the two solutions are mixed together, the volumes and hence their masses are added together).

Explanation:

Step1: Density of water

Assume the density of water is \(1\space g/mL\).

Step2: Calculate total volume

The total volume of the two solutions is \(V = 2.5\space mL+ 2.5\space mL=5.0\space mL\).

Step3: Calculate mass

Using the formula \(m=
ho V\) (where \(
ho = 1\space g/mL\) and \(V = 5.0\space mL\)), we get \(m=(1\space g/mL)\times(5.0\space mL) = 5.0\space g\).

Answer:

5.0 g (since the two solutions are mixed together, the volumes and hence their masses are added together).