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SNC2P – UNIT TEST – Chemical Reactions

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Knowledge /25 Communication /25 Application /24

PART 2 – Short Answers [Knowledge 25 marks]

*Remember, matter can't be created or destroyed*3 M 1. Complete the following word equations:

a) barium bromide + ___________________ barium sulfate + magnesium bromideb) zinc + tin(II) chloride ____________________ + zinc chloride c) lithium + _________________ lithium selenide

3 M 2. Classify each of the reactions in question 1 (single displacement, double displacement, synthesis, decomposition, combustion or acid-base).a) ____________________ b) ___________________c) ___________________

2 M 3. How much less acidic is black coffee (pH 5) compared to lemon juice (pH 2)? Show how you calculated this value.

2 M 4. Name 4 physical traits that could be used when describing a substance.

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6 M 5. Balance the following chemical equations:

KI + PbSO4 K2SO4 + PbI2

AgNO3 + Cu Cu(NO3)2 + Ag

Na + H2O NaOH + H2

9 M 6. Write the balanced chemical equation for:

Iron + sulphuric acid(H2SO4) iron (III) sulphate + hydrogen

calcium + water calcium hydroxide + hydrogen

potassium nitrate + iron(II)sulphate iron nitrate + potassium sulphate

PART 3 – Diagrams [Communication 8 marks]

Use complete sentences when appropriate to answer this section.

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4M 7. Using Lewis structures, diagram the ionic bonding process showing the creation of the compound sodium sulphide from its elements.

4M 8. Using Lewis structures, diagram the molecular bonding process showing the creation of the compound nitrogen trifluoride from its elements.

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PART 4 Communication [17 marks comm.]

Label the following diagram

Identify the following lab equipment (9 Marks)

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Identify what each of the following MSDS Symbols mean (3 Marks)

Part 5 Application

Read the following questions carefully. Communicate and apply the concepts, principles, and theories of chemistry you have learned. Your answers should be in proper sentence format.

1. You have performed a lab experiment in class and have observed that the reaction produced a gas. Describe how you would test the gas to see if it is oxygen, hydrogen or carbon dioxide. (Choose Two of Them).

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2. You have been asked by your mother to prepare the potatoes for the family dinner. She did not specify but usually you have mashed potatoes. She hands you 5 potatoes with their skin on. Using your understanding of rates of reactions, describe 4 things you could do to cook the potatoes as quickly as possible. Explain why each of these things helps the reaction go faster.

3. During our chemistry unit, we discussed working safely with chemicals and equipment. When completing a lab, name safety measures you can take, to work safely, and describe an accident that could happen in the lab and how you should respond correctly to it(what should you do).

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