SNC2D CHEM UNIT REVIEW By Ms. Lan (Mar. 2012). 1. This is a Bohr-Rutherford diagram of what element ? Phosphorus.

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Presentation transcript:

SNC2D CHEM UNIT REVIEW By Ms. Lan (Mar. 2012)

1. This is a Bohr-Rutherford diagram of what element ? Phosphorus

2. What are the products of incomplete combustion? Carbon dioxide, water, carbon, carbon monoxide

3. Are there more hydrogen ions in an acidic solution or basic solution? Acidic

4. Magnesium + water  magnesium hydroxide + hydrogen gas a)Write the balanced chemical equation for this reaction. Mg (s) + H2O (l)  Mg(OH) 2(aq) + H2 (g) b) Classify the type of reaction. Single displacement

5. What is the chemical name of Pb(NO 3 ) 2 ? Lead (II) nitrate

6. What is the chemical formula for decacarbon octahydride? C 10 H 8

7. Using an acid/base indicator of your choice, how can you tell if a solution is acidic or basic? Answers will vary.

8. 8. a)How many protons, electrons and neutrons does Magnesium have? p = 12, e = 12, n = 12 p = 12, e = 12, n = 12 b) What is the ion that Magnesium forms? Mg 2+

9. Using the Law of Conversation of Mass explain what the mass of the products would be in an experiment if the mass of the reactants are 35.2 g. The Law of Conversation of Mass states that the mass of reactions = mass of products. Therefore the mass of the products should be 35.2 g too.

10. Which is more acidic: stomach acid, lemon, coke or baking soda? Stomach acid. It has a pH of ~ 1.5 – 2.

11. One solution has a pH of 4 and another solution has a pH of 7. a)Which solution is more acidic? Solution with a pH of 4. b) How much more acidic is this solution that the other solution? The pH scale increases/decreases by 10 every number therefore a difference of 3 is really 10 3 = 1000.