C) A voltaic cell consists of Zn/Zn2+ half-cell and a Ni2+/Ni half-cell at 25°C. i. What is the initial concentration if the initial concentration of Ni2+ and Zn2+ are
1.75 M and 0.15 M, respectively?
ii. What is the cell potential when the concentration of Ni2+ has fallen to 0.45 M?
ii.
What is the number mole of Zn2+ in 500 ml solution if Ecell is 0.6 V and [Ni2+]
is 2.8 M

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]