Question

How many grams of kno3 are present in 185ml of a 2.50MSolution

Answer 1

Answer: 46.75 g

Explanation: Molarity : It is defined as the number of moles of solute present per liter of solution.

Formula used :

$Molarity=\frac{n}{V_s}$

where,

n= moles of solute

$V_s$ = Volume of solution in L = 0.185 L  (1L=1000 ml)

$\text{no of moles}={\text{Molarity}\times {\text{Volume in L}}$

Thus $\text{no of moles}of KNO_3={2.50M}\times {0.185 L}=0.46$

Mass of $KNO_3$ = $moles\times {\text {Molar mass}}=0.46\times 101.1g/mol=46.75g$