Review of Chapters 5 and 6 of the Chemistry Unit

SNC 2D0-01Chemistry ReviewChapters 5 and 6Multiple ChoiceIdentify the letter of the choice that best completes the statement or answers the question.____ 1. A chemical change is distinguished from a physical change because, in a chemical change, the originalsubstance changes itsa. composition. d. mass.b. size. e. state.c. shape.____ 2. A gas is proved to be carbon dioxide if:a. a glowing splint bursts into flames in the gas.b. a wet piece of red litmus goes blue in the gas.c. limewater goes milky when shaken with the gas.d. a burning splint causes a small explosion in the gas.e. an unlit splint ignites in the gas.____ 3. A bright yellow solid substance is known to be an element. It is brittle and will shatter if hit with a hammer. Itis a poor conductor of both heat and electricity. This element is best called a(n)a. alkali metal. d. noble gas.b. metal. e. periodic element.c. nonmetal.____ 4. In the Periodic Table, elements with similar properties are grouped ina. diagonal rows. d. vertical columns.b. horizontal rows. e. rectangular blocks.c. periods.____ 5. XF 2 is the formula of a metallic fluoride. The formula of the corresponding metallic oxide of X isa. XO. d. X 2 O.b. XO 2. e. X 2 O 3.c. XO 4.____ 6. Atoms of element A have 2 electrons in their last occupied orbit. Atoms of element B have 7 electrons in theirlast occupied orbit. The formula of the compound formed between A and B isa. A 2 B. d. A 7 B 2.b. AB 2. e. AB 5.c. AB 3.____ 7. Select the correct corresponding name.a. Sn 2 SO 4 - tin(II) sulfate d. Cu 2 PO 4 - copper(I) phosphateb. PbCO 3 - lead(IV) carbonate e. None of these is named correctlyc. Fe(ClO 3 ) 3 - iron(III) chlorate____ 8. When atoms form chemical bonds they cana. gain electrons only. d. lose or gain electrons only.b. lose electrons only. e. share electrons only.c. lose, gain, or share electrons.1

14. Give the compound name or formula as required.CaCl 2 Sr 3 P 2BaI 2hydrogen chloridealuminum nitridezinc sulfideNa 3 Npotassium oxidesodium fluoride15. Give the compound name or formula as required.Na 2 CO 3 Sn(NO 3 ) 2potassium bromideCu(OH) 2 Al(HCO 3 ) 3zinc chloratepotassium sulfate16. Give the compound name or formula as required.SO 2 CF 4NBr 3 CS 2carbon dioxidesilicon tetrabromide17. Give three uses for fossil fuels and their products.calcium phosphatelead(IV) carbonatenitrogen phosphidechlorine oxide18. A chemical reaction is represented by the following word equation:magnesium + sulfuric acid → hydrogen + magnesium sulfatea. What are the products of this reaction?b. What are the reactants in this reaction?19. Write word equations for the following chemical reactions.a. Tarnish (Ag 2 S) forms when a silver spoon is placed in sulfur.b. KOH and H 2 result when H 2 O and potassium are mixed.20. One component of the haze found over industrial areas is ammonium sulfate. It occurs when ammonia andsulfuric acid are present in the air. Write out the word equation for this reaction.21. Complete the following word equations.a. copper + silver nitrate → _________ + copper(II) nitrateb. iron + __________ → iron(III) oxidec. lead nitrate + _________ → lead iodide + potassium nitrate22. Balance the following equation: PbS + O 2 → PbO + SO 223. Balance the following equation: Al 4 C 3 + H 2 O → Al(OH) 3 + CH 424. When sugar, C 6 H 12 O 6 , is strongly heated, water is driven off and the element carbon is left (something similaroccurs when toast burns).a. Write out a balanced chemical reaction for strongly heating sugar.b. Classify the reaction type.3

25. Classify each of the following as either a synthesis or a decomposition reaction.a. Ca + Cl 2 → CaCl 2b. CaCO 3 → CaO + CO 2c. MgO + H 2 O → Mg(OH) 2d. 2 NaHCO 3 → Na 2 CO 3 + H 2 O + CO 226. Write out balanced chemical equations for each of the following reactions and classify the reaction type.a. Sodium and oxygen react to form sodium oxide.b. Silver oxide when heated produces oxygen and silver.c. Magnesium carbonate when heated produces magnesium oxide and carbon dioxide.d. Bromine reacts with aluminum to form aluminum bromide.4

Chemistry Chapters 5 and 6Answer SectionMULTIPLE CHOICE1. ANS: A REF: UC LOC: UBC12. ANS: C REF: AS LOC: DS73. ANS: C REF: UC LOC: UBC54. ANS: D REF: UC LOC: UBC15. ANS: A REF: UC LOC: UBC16. ANS: B REF: UC LOC: UBC17. ANS: C REF: UC LOC: UBC18. ANS: C REF: UC LOC: UBC19. ANS: A REF: UC LOC: UBC310. ANS: E REF: UC LOC: UBC3SHORT ANSWER12. ANS:a.b. lithium is the metal and oxygen is the nonmetal.c.d. lithium - 1+ oxygen - 2-e. Li 2 O lithium oxideREF: UC LOC: DS213. ANS:K 2 S - potassium sulfideAg 2 O - silver oxideAlBr 3 - aluminum bromideZnF 2 - zinc fluoridesodium oxide - Na 2 O calcium nitride - Ca 3 N 2lithium iodide – LiIpotassium phosphide - K 3 Pberyllium chloride - BeCl 2 magnesium hydride - MgH 25

REF: UC LOC: UBC114. ANS:CaCl 2 - calcium chlorideBaI 2 - barium iodidehydrogen chloride - HClaluminum nitride - AlNzinc sulfide - ZnSREF: UC LOC: UBC115. ANS:Na 2 CO 3 - sodium carbonateCu(OH) 2 - copper(II) hydroxideMg 3 P 2 - magnesium phosphideNa 3 N - sodium nitridepotassium oxide - K 2 Osodium fluoride - NaFpotassium bromide - KBrSn(NO 3 ) 2 - tin(II) nitrateAl(HCO 3 ) 3 - aluminum hydrogen carbonatezinc chlorate - Zn(ClO 3 ) 2 calcium phosphate - Ca 3 (PO 4 ) 2potassium sulfate - K 2 SO 4 lead(IV) carbonate - Pb(CO 3 ) 2REF: UC LOC: UBC116. ANS:SO 2 - sulfur dioxideNBr 3 - nitrogen tribromidecarbon dioxide - CO 2silicon tetrabromide - SiBr 4CF 4 - carbon tetrafluorideCS 2 - carbon disulfidenitrogen phosphide - NPchlorine oxide - Cl 2 OREF: UC LOC: UBC117. ANS:Examples include: fuel, lubricants, waxes, asphalt, tar, fertilizers, plastics, rubber etc.REF: UC LOC: RST218. ANS:a. The products are hydrogen and magnesium sulfate.b. The reactants are magnesium and sulfuric acid.REF: UC LOC: UBC319. ANS:a. silver + sulfur → silver sulfideb. potassium + water → potassium hydroxide + hydrogenREF: UC LOC: DS220. ANS:ammonia + sulfuric acid → ammonium sulfateREF: UC LOC: DS221. ANS:a. silverb. oxygenc. potassium iodide6