Question

Calculate the amount and mass of starting substances ‚If 10 grams of salt were obtained by their interaction. The reaction equation has the following form: Zn+2HCl -> ZnCl(2)+H(2)​

Answer 1

mass Zn : 4.77 g

mass HCl : 5.32 g

Further explanation

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

`\tt Zn+2HCl\rightarrow ZnCl_2+H_2`

MW ZnCl₂=136,286 g/mol

`\tt mol=(10)/(136.286)=0.073`

mol Zn : mol ZnCl₂ = 0.073

mass Zn :

`\tt 0.073* 65,38=4.77~g`

mol ZnCl₂ : mol HCl = 1 : 2

mol HCl :

`\tt 0.073* 2=0.146`

mas HCl :

`\tt 0.146* 36,46=5.32~g`