Question

1. Which of the following aqueous solutions contains the greatest number of ions in solution?
A) 2.0 L of 1.50 M magnesium chloride

B) 1.0 L of 3.00 M sodium sulfate

C) 2.0 L of 1.50 sodium phosphate

D) 3.0 L of 1.50 M sodium chloride

E) 2.0 L of 2.00 M potassium fluoride

2. The reaction Cl₂(g)+NaBr(aq)→NaCI(aq)+Br2

involves changes in oxidation number an is therefore classified as redox reaction

True or False?

3. the reaction NiS(s)+O_2(g)→NiO(s)+SO_2(g)

Involves changes in oxdation number and is therefore classified as a redox reaction?

True or false

4. The Reaction AgNo_3(aq)+NH₄Br(aq)→AgCl(s)+NH₄NO₃(aq)

Involves changes in oxdation number and is therefore classified as a redox reaction?

True or false

5. The reaction HCI(aq)+Na₂CO₃(aq)→NaCl(aq)+H₂O(I)+CO_2(g)

Involves changes in oxdation number and is therefore classified as a redox reaction?

True or false

Please explain why is true and false!

Answer 1

A) 2.0 L of 1.50 M magnesium chloride contains 9 moles.

B) 1.0 L of 3.00 M sodium sulfate contains 9 moles

C) 2.0 L of 1.50 sodium phosphate  contains 12 moles.

D) 3.0 L of 1.50 M sodium chloride contains 9 moles.

E) 2.0 L of 2.00 M potassium fluoride contains 8 moles.

Hence, answer is 2.0 L of 1.50 sodium phosphate  contains 12 moles.