Question

calculate the molarity of a solution containing 1.5 G of NaOH in 250cm of solutions​

Answer 1

The molarity of solution containing 1.5 g of NaOH in 250 cubic meter of solutions​ is 0.1 M.

To calculate Molarity, we use formula :

Molarity(M)= m*1000/ M*V(ml)

where m is mass of solute, M is molecular mass of solute and V is volume of solution.

In the given question we have;

Mass of NaOH (m) = 1.5g

The volume of solution (V) = 250 $cm^{3}$

we convert cubic meter into milliliter; 250$cm^{3}$=250ml

Mol. wt of NaOH (m) = 40g/mol

Now, we calculate the molarity,

Molarity = m*1000/M*V(ml)

M = 1.5*1000/250*40

Molarity =0.1 M

​Thus, the molarity of solution is 0.1 M.

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