Question

Find M of 49 % w/v H3PO4​

Answer 1

Given - Concentration of H3PO4 = 49% w/v.

Find - Molarity of H3PO4.

Solution - Molarity of solution is calculated by the formula - number of moles/volume of solution in litres.

Mathematically representing the formula -

M = w/mol wt/vol (litres).

The question states 49 gram H3PO4 is present in 100 ml of solution.

Keeping the values in equation-

M = (49/98)/(100/1000)

M = 0.5/0.1

M = 5 M

Hence, the molarity of 49% weight/volume H3PO4 is 5 M.