Question

1 . ZnCl2+.......=Zn(OH)2...........2.ОПРЕДЕЛИТЬ КАКОЕ КОЛИЧЕСТВО ВЕЩЕСТВА ВОДЫ ПОЛУЧИТСЯ ЕСЛИ В РЕАКЦИЮ С ВОДОРОДОМ ПОСТУПИЛО 8Г КИСЛОРОДА (Н.У.)

Answer 1

1.ZnCl2+2NaOH=Zn(OH)2+2NaCl

 

2. H2+1/2O2=H2O

1) n(O2)=m(O2)/M(O2)=8/32=0.25

2)2n(O2)=n(H2O)=0.25*2=0.5

 

Answer 2

1). ZnCl2 + 2NaOH → Zn(OH)2↓ + 2NaCl

2). Решение:

n(O2)=8/32=0,25 моль

O2 + 2H2 → 2H2O

0,25 : 1=х : 2

х=0,5 моль=n(H2O)

Ответ: n(H2O)=0,5 моль

Answer 3

Reaction Equation:

The reaction equation you provided is: ZnCl2 + H2O2 → Zn(OH)2 + HCl.

Determining the Amount of Water Produced:

To determine the amount of water produced in the reaction, we need to calculate the stoichiometric ratio between the reactants and products. From the balanced equation, we can see that the stoichiometric ratio between ZnCl2 and Zn(OH)2 is 1:1, meaning that for every 1 mole of ZnCl2, 1 mole of Zn(OH)2 is produced.

However, the reaction equation you provided involves hydrogen peroxide (H2O2) and not water (H2O). To calculate the amount of water produced, we need to consider the decomposition of hydrogen peroxide into water and oxygen gas. The balanced equation for the decomposition of hydrogen peroxide is:

2 H2O2 → 2 H2O + O2.

From this equation, we can see that the stoichiometric ratio between H2O2 and H2O is 2:2, or simply 1:1. This means that for every 1 mole of H2O2, 1 mole of water is produced.

You mentioned that 8 grams of oxygen (O2) were involved in the reaction. To determine the amount of water produced, we need to convert the mass of oxygen to moles. The molar mass of oxygen (O2) is approximately 32 g/mol. Therefore, the number of moles of oxygen is calculated as follows:

moles of oxygen = mass of oxygen / molar mass of oxygen = 8 g / 32 g/mol = 0.25 mol.

Since the stoichiometric ratio between H2O2 and H2O is 1:1, the number of moles of water produced is also 0.25 mol.

Therefore, if 8 grams of oxygen were involved in the reaction, 0.25 moles of water would be produced.

Please note that the reaction equation you provided does not specify the amounts of ZnCl2 and H2O2 involved, so we cannot determine the exact amount of water produced without that information.