Write and balance the following equation: A solution of Sodium hydroxide reacts with a solution of iron (III)
nitrate to create a solid of iron (III) hydroxide in a solution of
sodium nitrate.

Balanced equation :

3NaOH + Fe(NO₃)₃⇒ Fe(OH)₃ +  3NaNO₃

Given

Word equation

Required

Balanced equation

Solution

Chemical equations can be expressed in terms of:

Sodium hydroxide reacts with a solution of iron (III)

nitrate to create a solid of iron (III) hydroxide in a solution of

sodium nitrate.

We determine the chemical formula of each compound then we balance the chemical equation

Sodium hydroxide = NaOH

Iron (III)nitrate = Fe(NO₃)₃

Iron (III) hydroxide = Fe(OH)₃

Sodium nitrate = NaNO₃

Reaction

NaOH + Fe(NO₃)₃⇒ Fe(OH)₃ +  NaNO₃

Give a coefficient(most complex compound = 1)

aNaOH + Fe(NO₃)₃⇒ bFe(OH)₃ +  cNaNO₃

Fe, left = 1, right=b⇒b=1

N, left=3, right=c⇒c=3

O, left=a+9, right=3b+3c⇒a+9=3b+3c⇒a+9=3.1+3.3⇒a+9=12⇒a=3

The equation becomes :

3NaOH + Fe(NO₃)₃⇒ Fe(OH)₃ +  3NaNO₃

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).