# Balanced equations

## Main Question or Discussion Point

Predict the products and write balanced equations for the following reactions:

(a) AgNO3 + HCl

(b) Zn + HCl

(c) C2H5OH + O2 + heat

For (a) i got AgNO3 + HCl = AgCl + HNO3
For (b) i got Zn + 2HCl = ZnCl2 + H2

Did i do it right? I have no idea how to do part (c)? Also what do they mean to predict the product?

Pyrrhus
Homework Helper
If i remember correctly the chemistry i was taught in my freshman year

C) Will give as products CO2, H2O, and Energy, like any good combustion reaction with organic substances

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so for c) would it be: C2H5OH + O2 + heat = co2 + h20 + heat?

chem_tr
Gold Member
Hello,

All answers are correct, except that in (c) you have to write its balanced equation. If there are two carbons in ethyl alcohol, then two moles of CO2 must be produced, as you know. The balanced form is easy to write, just make all atom numbers equal in both sides.

am still confused so for c) C2H5OH + O2 + heat is it:

4 C2H5OH + 13 O2 + heat = 8CO2 + 10 H2O

chem_tr
$$C_2H_5OH + O_2 \rightarrow CO_2 + H_2O$$