Chapter 4

Question 1

What are the coefficients for the following reaction when it is properly balanced?
___Na2O+___Ba(NO3)2 —> ___NaNO3+___BaO

Answer 1

1, 1, 2, 1

Question 2

Before a chemical equation can be written, one must know:

Answer 2

The symbols and formulas (with subscripts) of all reactants and products

Question 3

When the equation
___O2+___H2 —> ___H2O is balanced, the coefficient of hydrogen is:

Answer 3

2

Question 4

An aqueous solution is:

Answer 4

Water with another compound dissolved in it

Question 5

Name a soluble compound

Answer 5

Sodium Carbonate

Question 6

What is typically NOT a sign of a chemical reaction?

Answer 6

Absorbing light when chemicals are contacted with each-other

Question 7

A reaction which forms a solid product is an example of a:

Answer 7

Precipitation Reaction

Question 8

What would be the formula of the precipitate that forms when Pb(NO3)2 (aq) and K2SO4 (aq) are mixed?

Answer 8

PbSO4

Question 9

What is the coefficient in front of the precipitate when the following reaction is balanced?
Na2 CO3 (aq) + Fe (NO3) 3 (aq)

Answer 9

1

Question 10

Considering the following precipitation reaction:
Cu NO3 (aq) + LiCl (aq) —> CuCl(s) + LiNO3 (aq)
Which ions would Not be present in the net ionic equation?

Answer 10

Li+ and NO3