Question

If a sample of 0.140 g of KCN is treated with an excess of HCl, how do you calculate the amount of HCN formed, in grams?

Answer 1

Answer:

Hi there,

Explanation:

According to the equation

KCN+ HCl=>HCN + KCL

so, one mole of KCN will produce one mole of HCN

Molar mass of KCN is 65gm

Molar mass of HCN is 27

So the mass of HCN is 27 ×0.14 ÷ 65

= 0.058 g

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