Question

14). 100 ml of 5 M HNO3 is mixed with 800 ml of 2.5 M HNO3 solution . The molarity of the resultant solution becomes:

a) 3.28M
b) 3.72M
c) 4.21M
d) 2.78 M

Answer 1

Answer:

hope you are happy with it.

and enter my meet for further questions

Answer 2

Given - Volume of solution 1 : 100 ml

Molarity of solution 1 : 5 M

Volume of solution 2 : 800 ml

Molarity of solution 2 : 2.5 M

Find - Molarity of resultant solution

Solution - Molarity of resultant solution will be calculated by formula - MV = M1V1 + M2V2. M and V resultant molarity and volume.

Resultant volume will be = 100 + 800 = 900 ml.

Keeping the values in formula -

M*900 = 5*100 + 2.5*800

M*900 = 500 + 2000

M = 2500/900

M = 2.78 M

Hence, molarity of resultant solution will be d) 2.78 M.