Answer to Question #227499 in Physical Chemistry for Elise

Question #227499

Calculate the number of hydroxide ions in 10.0 g of zinc hydroxide.

Expert's answer

Molar mass zinc hydroxide = 99.424

Mol zinc hydroxide in 10g = 10g/99.424g/mol = 0.101 mol

1mol Zn(OH)2 contains 2 mol OH - ion

0.101 mol Zn(OH)2 contains 2*0.101 = 0.202 mol OH ions

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