Chapter 5 – Solutions Quiz #1
Name:_______________
1) Below are the results of a lab which tested 5 unknown chemicals for
conductivity, solubility and effect on litmus paper.
Table 1: Solubility, Conductivity and Litmus Test Results
Chemical
Solubility in H2O(l)
Conductivity Effect on
Litmus
1
High
High
Red to Blue
2
High
None
No change
3
None
None
No change
4
High
High
Blue to Red
5
High
High
No change
Using the information from the table above, identify the unknown chemicals
by matching their numbers to the compounds below. (5 marks)
_____MgCl2(S)
____C8H18(s)
_____HClO4(s)
____KOH(s)
_____C6H12O6(s)
2) Complete the sentence by filling in the blanks with the appropriate words
given below. Not all words will be used. (3 marks)
Endothermic
Magic
Exothermic
Breaking
Forming
When dissolving a chemical, if more energy is released by bonds
_____________ than is absorbed by bonds_______________, then
the dissolving process is said to be________________
3) An evil factory dumps 80 kg of toxic waste into a 2.6 x 107 L lake. What is
the concentration of toxic waste in the lake in parts per million?
(1 ppm = 1 mg/L) (2 marks)
4) A zombie outbreak has occurred and you are trapped in your school’s lab
room. The only way to escape is to prepare a zombie repellent using the
chemicals in the lab. Before he was turned into a zombie, your chemistry
teacher showed you that the zombie repellent must be a 1.30 mol/L solution
of magnesium bromide in water. What mass of magnesium bromide must
you dissolve in 2.00 L of water to prepare this solution? (4 marks)