Question

А)CuSO 4 = ZnSO 4 +? б)Pb(NO 3 ) 2 +Na 2 S = PbS+? і розставити коефіцієнти

Answer 1

Ответ:

А) ....+Сu

Б) ....+2NaNO3

Объяснение:

Answer 2

To balance the chemical equations, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Let's balance the given chemical equations:

а) CuSO4 = ZnSO4 + ?

First, let's balance the copper (Cu) atoms:

CuSO4 = ZnSO4 + ?

There is one Cu atom on the left side and none on the right side. We need to balance it, so we put a coefficient of 1 in front of ZnSO4:

CuSO4 = 1 ZnSO4 + ?

Next, let's balance the sulfur (S) atoms:

CuSO4 = 1 ZnSO4 + ?

There are four S atoms on the left side and four on the right side. The sulfur atoms are already balanced.

Finally, let's balance the oxygen (O) atoms:

CuSO4 = 1 ZnSO4 + ?

There four O atoms on the left side, but only three on the right side (from ZnSO4). To balance the oxygen atoms, we add one more SO4 group to the right side:

CuSO4 = 1 ZnSO4 + 1 SO4

The balanced equation is:

CuSO4 = ZnSO4 + SO4

б) Pb(NO3)2 + Na2S = PbS + ?

First, let's balance the lead (Pb) atoms:

Pb(NO3)2 + Na2S = PbS + ?

There is one Pb atom on the left side and one on the right side. The lead atoms are already balanced.

Next, let's balance the nitrogen (N) atoms:

Pb(NO3)2 + Na2S = PbS + ?

There are two N atoms on the left side and none on the right side. We need to balance them, so we put a coefficient of 2 in front of Na2S:

Pb(NO3)2 + 2 Na2S = PbS + ?

Now, let's balance the sulfur (S) atoms:

Pb(NO3)2 + 2 Na2S = PbS + ?

There is one S atom on the left side and one on the right side. The sulfur atoms are already balanced.

Finally, let's balance the oxygen (O) atoms:

Pb(NO3)2 + 2 Na2S = PbS + ?

There six O atoms on the left side (from NO3) and none on the right side. We can balance the oxygen atoms by adding three O2 groups to the right side:

Pb(NO3)2 + 2 Na2S = PbS + 3 O2

The balanced equation is:

Pb(NO3)2 + 2 Na2S = PbS + 3 O2