Question

Be sure to answer all parts.

Add the physical state for each substance in the following aqueous reactions. Then write and balance a net ionic equation for each reaction.

(a)

Cr₂(SO₄)₃

+

KOH

→

Cr(OH)₃

+

K₂SO₄

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

(b)

K₂CrO₄

+

PbCl₂

→

KCl

+

PbCrO₄

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

(c)

Na₂SO₃

+

H₂SO₄

→

Na₂SO₄

+

H₂O

+

SO₂

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

	(aq)
	(s)
	(g)
	(l)

Answer 1

a)

Cr₂(SO₄)₃ (aq) + 6 KOH (aq) -----------------> 2 Cr(OH)₃ (s) + 3 K₂SO₄ (aq)

net ionic equation :   Cr³⁺(aq) + 3 OH^-(aq) ------------> 2 Cr(OH)₃ (s)

b)

K₂CrO₄ (aq) + PbCl₂ (aq) ---------------> PbCrO₄ (s) + 2 KCl (aq)

net ionic equation : Pb²⁺(aq) + CrO₄^2-(aq) -------------> PbCrO₄ (s)

c)

Na₂SO₃ (aq) + H₂SO₄ (aq) ----------------> Na₂SO₄ (aq) + H₂O (l) + SO₂ (g)

net ionic equation : SO₃^2-(aq) + 2H⁺(aq) ----------------> H₂O(l) + SO₂(g)