Question

Вычислите массу хлорида цинка , образовашегося в реакции замещения цинка массой 60 грамм соляной кислоты.

Answer 1

Дано:

m (Zn) = 60 г           

HCl

Найти:

m (ZnCl2)

Решение:

60 г                      x г

Zn  +  2HCl  = Zn Cl2  + H2↑

65  г                    136 г                            

60 г   --- х г

65  г --- 136 г

х = 60 г ∙ 136 г\65 г = 125,5 г

Ответ: m (ZnCl2) = 125,5 г

как я поняла по условию (запятые не раставлены и непонятно, чья масса дана)

 

 

 

 

Answer 2

Calculation of the Mass of Zinc Chloride Formed

To calculate the mass of zinc chloride formed in the reaction of zinc with hydrochloric acid, we need to use the balanced chemical equation for the reaction. The balanced equation for the reaction of zinc with hydrochloric acid is:

Zn + 2HCl → ZnCl2 + H2

From the balanced equation, we can see that 1 mole of zinc reacts with 2 moles of hydrochloric acid to produce 1 mole of zinc chloride. We can use this information to calculate the number of moles of zinc chloride formed.

Given that the mass of zinc used in the reaction is 60 grams, we need to convert this mass to moles. To do this, we need to know the molar mass of zinc. The molar mass of zinc is 65.38 g/mol.

Using the formula:

Number of moles = Mass / Molar mass

we can calculate the number of moles of zinc:

Number of moles of zinc = 60 g / 65.38 g/mol = 0.917 moles

Since the reaction is 1:1 between zinc and zinc chloride, the number of moles of zinc chloride formed is also 0.917 moles.

To calculate the mass of zinc chloride formed, we need to know the molar mass of zinc chloride. The molar mass of zinc chloride (ZnCl2) is 136.29 g/mol.

Using the formula:

Mass = Number of moles * Molar mass

we can calculate the mass of zinc chloride formed:

Mass of zinc chloride = 0.917 moles * 136.29 g/mol = 124.91 grams

Therefore, the mass of zinc chloride formed in the reaction is approximately 124.91 grams.

Please note that the provided search snippets did not directly provide the molar mass of zinc chloride, but the molar mass of zinc chloride (ZnCl2) is a well-known value in chemistry.