What volume of a 0.716 m kbr solution is needed to provide 30.5 g of kbr?

Question

Russell

Chemistry

23 August, 17:04

What volume of a 0.716 m kbr solution is needed to provide 30.5 g of kbr?

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Answers (1)

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Shelby Abbott · Answer 1

Answer is: volume of KBr is 357 mL.

c (KBr) = 0,716 M = 0,716 mol/L.

m (KBr) = 30,5 g.

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

n (KBr) = 30,5 g : 119 g/mol.

n (KBr) = 0,256 mol.

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

V (KBr) = 0,256 mol : 0,716 mol/L.

V (KBr) = 0,357 L · 1000 mL/L = 357 mL.