TEST #1

Chemical Processes /60

Mr. Halpin

SNC 2DO NAME:___________________

Dear Parent/Guardian,

Please sign to indicate that you are aware of your son/daughter's progress in this course.

_______________________

PART 1: MULTIPLE GUESS: (10 marks)

______1. When Lycopodium powder is blown into the air, it reacts much faster than when it is on the end of a scoopula. This is an example of the effect of:

A) concentration B) surface area C) temperature D) a catalyst

______2. In the synthesis of copper(II)sulphide, the sulphur had to be heated before the reaction would take place. This is an example of the effect of:

A) concentration B) surface area C) temperature D) a catalyst

______3. The acid found in stomach acid is used to etch concrete. This is an example of the effect of:

A) concentration B) surface area C) temperature D) a catalyst

______4. Hydrogen peroxide begins to decompose at room temperature when exposed to the enzyme catalase in blood. This is an example of the effect of:

A) concentration B) surface area C) temperature D) a catalyst

______5. What type of reaction occurs between iron sulphide and hydrochloric acid?

A) synthesis B) decomposition C) single displacement D) double displacement

______6. What is the formula for the compound copper(II) sulphate?

A) CoSO₄ B) Cu₂SO₄ C) CuS D) CuSO₄

______7. What is the name of the compound CCl₄?

A) Monocarbon tetrachloride B) Carbon tetrachloride

C) Carbon chloride D) Carbon chlorate

______8. Chemical reactions that produce heat are called:

A) exothermic B) exotempric C) endothermic D) endotempric

______9. The fundamental particle of the particle theory is the:

A) proton B) quark C) atom D) molecule

______10. Here is a jumbled list of steps for lighting a Bunsen burner:

• Connect the gas hose to the tap
• Light the match and hold it over the burner
• Adjust the air vents and needle valve to produce a clear blue flame
• Open the gas tap valve
• Make sure the air vents and needle valve are completely closed
• Slowly open the needle valve

What is the most correct sequence of steps?

A) 5,1,4,2,6,3 B) 1,5,6,2,4,3 C) 5,1,4,6,2,3 D) 1,3,2,4,5,6

PART 2: MATCHING: (10 marks)

1. Match the following terms by placing the letter of the corresponding definition on the line provided in front of the term. (10 marks)

______catalyst A. results when two non-metals share a pair of electrons

______chemical B. the burning of substance

______combustion C. a reaction between elements

______ionic compound D. a substance in which all the particles are the same

______molecular compound E. the charge on an electron

______negative F. a property that involves the production of a new substance

______pH G. results from the transfer of electrons from a metal to a non-metal

______polyatomic compound H. a number describing the acidity of a solution

______pure substance I. a substance that speeds up chemical reactions

______synthesis J. results from the transfer of electrons from a metal to a group of atoms

PART 3: SHORT ANSWER: (40 marks)

1. Give the name and formula of the compound produced in the lab "Synthesis of Copper(II) Sulphide". (2 marks)

2. Solution A has a pH of 2 and solution B has a pH of 6. How many times more acidic is A than B? (1 mark)

3. Write the chemical formula for each of the following. (5 marks)

a) Magnesium nitrite ______________________

b) Nitrogen trifluoride ______________________

c) Tin(IV) carbide ______________________

d) phosphoric acid ______________________

e) hydrobromic acid ______________________

4. Write the proper name for the following chemical formulae. (5 marks)

a) Cu(ClO₂)₂ ______________________

b) HF_(aq) ______________________

c) P₂S₅ ______________________

d) H₂SO_4(aq) ______________________

e) K₂S ______________________

5. Balance and classify each equation. (10 marks)

Type of reaction

a) ____Cu + ____I₂ --> ____CuI + energy __________________

b) ____Fe + ____CuSO₄ --> ____ Fe₂(SO₄)₃ + ____ Cu __________________

c) ____Pb(NO₃)₂ + ____KI --> ____PbI₂ + ____ KNO₃ __________________

d) ____C₅H₁₂ + ____O₂ --> ____CO₂ + ____H₂O + energy __________________

e) ____NaCl + energy --> ____Na + ____Cl₂ __________________

6. Classify and write the balanced chemical equation for each of the following. (9 marks)

a) Lithium + Sulphur --> Lithium sulphide

b) Magnesium hydroxide + Sulphuric acid --> Magnesium sulphate + water

c) Aluminum sulphate + calcium hydroxide --> aluminum hydroxide + calcium sulphate

7. Draw the Bohr-Rutherford diagram for chlorine and its stable ion form. (3 marks)

8. Draw the Lewis dot diagram for the element Boron. (1 mark)

9. Sulphur dioxide and nitrogen oxide are the two main gases responsible for acid rain. Describe three industrial strategies for reducing emissions of these gases. (3 marks)

10. Why is tartaric acid added to baking soda (sodium bicarbonate) to make baking powder?

(1 mark)

Mind Bender - Waiting to hand in your test? Try this mind bender question:

There are two beakers on the lab bench, one containing 100 ml of water and the other 100 ml of ethanol. You take 10 ml of the ethanol and add it to the water, then take 10 ml from this water-ethanol mix and add it to the ethanol. Does the water now contain more ethanol than the ethanol does water, or the other way around?