Question

Please show steps

Assigned Metal: ____ Data Analysis Write the balanced equation for the reaction between your assigned metal and HCI. All balancing coefficients should be whole numbers. Complete the table below with the results of your calculations.

Answer 1

See, during the experiment firstly the mass of dry calorimeter is measured in a weighing machine. Then the amount of HCl given is added in that calorimeter and mass of both calorimeter along with the HCl is now measured.

Now in order to calculate just the mass of HCl added, 1st observation is subtracted from the 2nd, which is 'mass of HCl used' in the table. Two trails are done for the above experiment for precise readings.

Similarly, mass of beaker is taken and then mass of beaker plus the metal given is measured. Subtraction gives the mass of metal provided.

Now the temperature of HCl in the calorimeter is recorded and then the metal from the beaker is added in the Calorimeter containing HCl to give a mixture of HCl plus Metal. Again the temperature of the system is recorded. The second one is temperature of the mixture and difference of the would give the temperature change on reaction and hence the change in energy of the system.

HCl + M⁺ (Metal considering univalent) => MCl + H⁺

if metal is not univalent, say the valency to be X, it would give the formula MCl_x.

Total mass of mixture = mass of HCl + mass of metal (wrongly written in the table)

Temperature change is the change in Initial temperature of the system and final tempered of the mixture after addition of HCl.

Given the SHC of the mixture, heat absorbed or released can be calculated by using the formula,

dH = mCdT where dH is the heat released or absorbed, dT is chnage in temperature and C is heat capacity of mixture.