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Answer to Question #22085 in Inorganic Chemistry for khadijah

Question #22085
What is the molar concentration of a solution containing 10.0 g of NaOH in 250 mL of solution?
Expert's answer
Themolar concentration of the solution can be found for the formula
Cm = n / V(solution);
So if we have 10.0 g of NaOH, we can find it's amount of substance
n(NaOH) = m(NaOH) / M(NaOH);
M(NaOH) = 23 + 16 + 1 = 40 g/mol;
n(NaOH) = 10g / 40 g/mol = 0.25 moles
So the molar concentration of solution will be
Cm(NaOH) = 0.25 moles / 0.25 L = 1mol/L

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