[sun725]

Hi,

I have the following equations that I have to balance ... I hope someone can help me and tell me if some of them are correct? Thanks in advance.

1. Mercury(II)chlorate and sodium sulfide
HgCl₂(aq)+Na₂S  2 NaClO₃ + HgS


2. Tin(II)chloride and Sodium disulfide
SnCl₂ (aq) + Na₂S₂ (aq)  2 NaCl (aq) + 2SnS (s)

3. Tin(IV)chloride and Sodium disulfide
SnCl₄ (aq)+Na₂S₂       4NaCl(aq)+2SnS

4.  Lead(II) nitrate and Sodium disulfide
Pb(NO3)2 (aq)+ Na₂S₂ (aq)  2 NaNO₃ (aq)+ PbS (s)

5. Copper(II)sulfate +Sodium disulfide

CuSO₄(aq) + Na₂S₂(aq)  CuS(s) + Na₂SO₄(aq)

[AWK]

All reactions are not balanced correctly.
1. there is no oxygen atom on the left side
2. in this case Na₂S₂ works as oxidizer
3-5. in these reactions elemental sulfur should be added on the right side of equations.

with the excess of Na₂S₂ the same trithiostannate is formed from both: SnS and SnS₂

[sun725]

Thank you, sir.

So,
1.  HgCl₂(aq)+Na₂S ₂ NaCl₃ + HgS 

2. SnCl₂ (aq) + Na₂S₂ (aq)  2 NaCl (aq) + SnS (s) 

3. SnCl₄ (aq)+Na₂S₂       4NaCl(aq)+SnS

4. Pb(NO3)2 (aq)+ Na2S2 (aq)  2 NaNO3 (aq)+ PbS (s)  (no idea what to do here - how to add elemental sulfur)

5. CuSO₄(aq) + Na₂S₂(aq)  CuS(s) + SnS (aq)

I hope you can be patient with me, as I have a hard time solving them. Thanks in advance.

[AWK]

No, no, no, no, no.

4. Pb(NO3)2 (aq)+ Na2S2 (aq)  2 NaNO3 (aq)+ PbS (s)  (no idea what to do here - how to add elemental sulfur)

simply
Pb(NO₃)₂(aq)+ Na₂S₂(aq)  2NaNO₃(aq)+ PbS(s) + S(s)  (strictly S₈(s))

[sun725]

So, they're still all wrong?

[AWK]

So, they're still all wrong?

Except this one in my last post. This is also form for equations 1, 3 and 5.
In both equation, 2 and 3 SnS₂ is formed, or in excess of Na₂S₂ - soluble Na₂SnS₃.
This is part of qualitative inorganic chemical analysis. Search for textbook.
Knowledge on balancing chemical reaction is also needed.
http://www.chembuddy.com/?left=balancing-stoichiometry&right=toc

[sun725]

Did my best ... Hope some of them are correct now?

Mercury(II)chlorate and sodium sulfide HgCl2(aq)+Na2S⟶2NaCl3+HgS
Tin(II)chloride and Sodium disulfide SnCl2(aq)+Na2S2(aq)⟶2NaCl(aq)+SnS2(s)
Tin(IV)chloride and Sodium disulfide SnCl4(aq)+Na2S2⟶4NaCl(aq)+SnS2(s)
Lead(II) nitrate and Sodium disulfide Pb(NO3)2(aq)+Na2S2(aq)⟶2NaNO3(aq)+PbS(s)+S(s)
Copper(II)sulfate + Sodium disulfide CuSO4(aq)+Na2S2(aq)⟶CuS(s)+Na2SO4(aq)+S(s)

[Arkcon]

Did my best ... Hope some of them are correct now?

Mercury(II)chlorate and sodium sulfide HgCl2(aq)+Na2S⟶2NaCl3+HgS

HgCl2 is not the formula for mercury(II) chlorate, but instead the formula for mercury (II) chloride.  I don't know where the error is, the name or the formula, but you won't get points on an exam without fixing things like that.

[sun725]

You're right. It's a typing error. It should be mercury (II) chloride and not mercury(II) chlorate as I've been written earlier.

[AWK]

Mercury(II)chlorate and sodium sulfide HgCl2(aq)+Na2S(aq)⟶2NaCl3+HgS

NaCl₃

Tin(IV)chloride and Sodium disulfide SnCl4(aq)+Na2S2(aq)⟶4NaCl(aq)+SnS2(s)

Sodium and sulfur atoms balacing

[sun725]

There is no thing such as NaCl₃ (sorry ) ... It should only be 2NaCl. Right?

However, I'm still confused on the others. Are they still wrong?

[AWK]

left side 2Na + 2S
Right side 4Na + 2S

[sun725]

It might be that I'm slow, but I still don't know which of the equations you're referring to.
However, thanks for the help...
i'll just hand it like it's now. Thanks again

[Borek]

Why don't you simply check if the reaction is balanced on your own? Count all atoms of all elements on both sides (and charges, if they are involved) - if numbers are the same, reaction is balanced, if they are different, the reaction is not balanced (atoms can't miraculously disappear nor show up from nowhere, that's what mass conservation tells us).