How many grams of 50 wt% NaOH (FM 40.00) should be diluted to 1.00 L to make 0.10 M NaOH?

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Chemistry

Stich

2 December, 16:59

How many grams of 50 wt% NaOH (FM 40.00) should be diluted to 1.00 L to make 0.10 M NaOH?

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Halle Benton · Answer 1

Answer is: 8 grams of NaOH.

V (NaOH) = 1 L.

c (NaOH) = 0,1 mol/L.

n (NaOH) = V (NaOH) · c (NaOH).

n (NaOH) = 1 L · 0,1 mol/L.

n (NaOH) = 0,1 mol.

m (NaOH) = n (NaOH) · M (NaOH).

m (NaOH) = 0,1 mol · 40 g/mol.

m (NaOH) = 4 g, pure NaOH.

m (NaOH-50%) = 4 g : 0,5 = 8 g.

n - amount of substance.

c - concentration.

V - volume.