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beks73 [17]
3 years ago
5

When 80 g of sodium hydroxide, naoh, are dissolved in enough water to make 500 ml of solution, the molarity of the solution is —

a 1 m b 2 m c 4 m d 8 m?
Chemistry
1 answer:
enyata [817]3 years ago
7 0

<span>Answer is: molarity of sodium hydroxide solution is c. 4 M.</span><span>
m(NaOH) = 80.0 g.
n(NaOH) = m(NaOH) ÷ M(NaOH).
n(NaOH) = 80 g ÷ 40 g/mol.
n(NaOH) = 2 mol.
V(NaOH) = 500 mL ÷ 1000 mL/L = 0.5 L.
c(NaOH) = n(NaOH) ÷ V(NaOH).
c(NaOH) = 2 mol ÷ 0.5 L.
c(NaOH) = 4 mol/L.</span>

<span>n - amount of substance.</span>

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