Chemical Compounds and Reactions

This video tutorial explains the reaction between nickel(II) sulfate (NiSO4) and water (H2O). It covers the properties of nickel sulfate, its solubility in water, and the dissociation into nickel ions (Ni2+) and sulfate ions (SO4 2-). The video also discusses solubility rules, exceptions, and how to write the chemical equation for the reaction, emphasizing the use of 'aq' for aqueous solutions.

What is the chemical formula for nickel(II) sulfate?

• NiSO4

• Ni2SO4

• NiSO3

• Ni(SO4)2

What type of compound is nickel(II) sulfate?

• Molecular

• Metallic

• Ionic

• Covalent

According to solubility rules, are most sulfates soluble in water?

• Only in acidic solutions

• Only in basic solutions

• Yes, with few exceptions

• No, they are generally insoluble

What is the charge on the sulfate ion when nickel sulfate dissociates in water?

• 1+

• 2-

• 1-

• 2+

What is the charge on the nickel ion in nickel(II) sulfate?

• 2-

• 3+

• 2+

• 1+

How is the state of ions in solution indicated in a chemical equation?

• By using 'l' for liquid

• By using 'g' for gas

• By using 'aq' for aqueous

• By using 's' for solid

Where might you sometimes see water written in a chemical equation?

• Above the arrow

• Below the arrow

• To the left of the reactants

• To the right of the products

What does 'aq' stand for in a chemical equation?

• Aqueous solution

• Aqua

• Aqueous

• Aquatic

Why might water not be written again in the products of a chemical equation?

• Because it is not involved in the reaction

• Because it is a solid

• Because 'aq' already indicates it is dissolved

• Because it evaporates