Question

What is the mass of nickel(ii) nitrate (182.71 g/mol) dissolved in 25.0 ml of 0.100 m ni(no3)2 solution?

Answer 1

Answer : The mass of nickel(II) nitrate is, 0.4568 grams

Explanation : Given,

Molar mass of nickel(II) nitrate = 182.71 g/mole

Volume of solution = 25.0 ml

Molarity = 0.100 M

Molarity : It is defined as the mass of solute present in one liter of solution.

Formula used :

`Molarity=(w* 1000)/(M* V)`

where,

w = mass of nickel(II) nitrate

M = molar mass of nickel(II) nitrate

V = volume of solution

Now put all the given values in the above formula, we get:

`0.100=(w* 1000)/(182.71* 25.0)`

`w=0.4568g`

Therefore, the mass of nickel(II) nitrate is, 0.4568 grams

Answer 2

The mass of ni(NO3)2 that dissolved in 25.0 ml of 0.100m ni(NO3)2 solution is calculated as follows

fin the number of moles = molarity x volume in liters

=25 x0.100/ 1000= 2.5 x10^-3 moles
mass = mass x molar mass
= 2.5 x10^-3 moles x 182.71 g/mol = 0.457 grams