You have 3.50 l of solution that contains 90.0 g of sodium chloride, nacl. what is the molar mass of nacl? what is the molarity of that solution?

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Chemistry

Lee Glass

6 March, 13:13

You have 3.50 l of solution that contains 90.0 g of sodium chloride, nacl. what is the molar mass of nacl? what is the molarity of that solution?

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Luca Nolan · Answer 1

M (NaCl) = Ar (Na) + Ar (Cl) · g/mol.

M (NaCl) = 22,99 + 35,45 · g/mol.

M (NaCl) = 58,44 g/mol.

V (NaCl) = 3,5 L.

m (NaCl) = 90 g.

n (NaCl) = m (NaCl) : M (NaCl).

n (NaCl) = 90 g : 58,44 g/mol.

n (NaCl) = 1,54 mol.

c (NaCl) = n (NaCl) : V (NaCl).

c (NaCl) = 1,54 mol : 3,5 L.

c (NaCl) = 0,44 mol/l = 0,44 M.