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Molarity Calculator

Find molarity, mass of solute or volume of solution using M = n/V and n = m/M — molar mass computed from the formula. Free chemistry calculator for GCSE, AP Chemistry and NEET.

Molarity

0.2002 mol/L0.2002\ \mathrm{mol/L}

0.2002 M · molar mass 58.44 g/mol

  1. 1

    Find the molar mass

    Add the atomic masses: 1 × Na (22.99), 1 × Cl (35.45).

    M(NaCl)=1(22.99)+1(35.45)=58.44 g/molM(\mathrm{NaCl}) = 1(22.99) + 1(35.45) = 58.44\ \mathrm{g/mol}
  2. 2

    Convert grams to moles

    n=mM=5.85 g58.44 g/mol=0.1001 moln = \frac{m}{M} = \frac{5.85\ \mathrm{g}}{58.44\ \mathrm{g/mol}} = 0.1001\ \mathrm{mol}
  3. 3

    Divide moles by litres of solution

    Molarity=nV=0.1001 mol0.5 L=0.2002 M\text{Molarity} = \frac{n}{V} = \frac{0.1001\ \mathrm{mol}}{0.5\ \mathrm{L}} = 0.2002\ \mathrm{M}

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FAQ

What is molarity?

Moles of solute per litre of solution: M = n / V(L).

How is molar mass found?

By adding the atomic masses of every atom in the formula.

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