Question

Вычислить массу соли образующаяся при взаимодействии 100 г цинка с соляной кислотой

Answer 1

Zn+2HCl--> ZnCl2+H2

Над цинком пишем 100 г, под ним пишем 65г

над ZnCl2 пишем x г, под ним пишем 136г

получаем пропорцию 100/65=х/136

отсюда найдем х=209,23

Answer 2

Zn+HCl--->ZnCl2+H2
n(Zn)=100/65
n(ZnCl2)=x/135
по пропорции
100/65=x/135
65x=13500
x=207,69 г.    
 ну там если надо округлять то округлишь

Answer 3

Calculation of the Mass of Salt Formed

To calculate the mass of salt formed when 100 g of zinc reacts with hydrochloric acid (HCl), we need to consider the balanced chemical equation for the reaction. The balanced equation is as follows:

Zn + 2HCl -> ZnCl2 + H2

From the equation, we can see that 1 mole of zinc (Zn) reacts with 2 moles of hydrochloric acid (HCl) to produce 1 mole of zinc chloride (ZnCl2) and 1 mole of hydrogen gas (H2).

To calculate the mass of salt formed, we need to determine the number of moles of zinc (Zn) and then use the stoichiometry of the balanced equation to find the corresponding mass of zinc chloride (ZnCl2).

Calculation Steps:

1. Determine the molar mass of zinc (Zn). The molar mass of zinc is 65.38 g/mol. 2. Calculate the number of moles of zinc (Zn) using the given mass of 100 g and the molar mass of zinc. The formula to calculate the number of moles is:

Moles = Mass / Molar Mass

Substituting the values, we get:

Moles of Zn = 100 g / 65.38 g/mol

3. Use the stoichiometry of the balanced equation to determine the number of moles of zinc chloride (ZnCl2) formed. From the balanced equation, we know that 1 mole of zinc (Zn) reacts to form 1 mole of zinc chloride (ZnCl2). Therefore, the number of moles of zinc chloride formed is the same as the number of moles of zinc.

4. Calculate the mass of zinc chloride (ZnCl2) formed using the number of moles of zinc chloride and the molar mass of zinc chloride. The molar mass of zinc chloride is 136.29 g/mol.

Mass of ZnCl2 = Moles of ZnCl2 * Molar Mass of ZnCl2

Substituting the values, we get:

Mass of ZnCl2 = Moles of Zn * 136.29 g/mol

Calculation Result:

By following the above steps, we can calculate the mass of zinc chloride (ZnCl2) formed when 100 g of zinc reacts with hydrochloric acid. However, since the exact concentration of the hydrochloric acid is not provided, we cannot determine the exact mass of the salt formed. The concentration of the hydrochloric acid affects the extent of the reaction and, consequently, the amount of salt formed.

Please provide the concentration of the hydrochloric acid so that we can calculate the mass of the salt more accurately.