Slide 1 / 62 Slide 2 / 62 1 What are the missing coefficients for the skeleton 2 What are the missing coefficients for the skeleton equation below? equation below? Al 2 (SO 4 ) 3 (aq) + KOH(aq) → Al(OH) 3 (aq) + K 2 SO 4 (aq) Cr(s) + Fe(NO 3 ) 2 (aq) → Fe(s) + Cr(NO 3 ) 3 (aq) A 4,6,6,2 A 1,3,2,3 B 2,3,2,3 B 2,12,4,6 C 2,3,3,2 C 4,6,2,3 D 1,3,3,1 D 1,6,2,3 E 2,3,1,2 E 2,3,1,1 Slide 3 / 62 Slide 4 / 62 3 What are the missing coefficients for the skeleton 4 If you rewrite the following word equation as a balanced equation below? chemical equation, what will the coefficient and symbol NH 3 (g) + O 2 (g) → N 2 (g) + H 2 O(l) for iodine be? bromine + potassium iodide potassium bromide + iodine A 4,3,2,6 2I - A B 2,1,2,3 B I C 1,3,1,3 C 2I D 2,3,2,3 D I 2 E 3,4,6,2 E 2I 2 Slide 5 / 62 Slide 6 / 62 5 If you rewrite the following word equation as a 6 What are the missing coefficients for the skeleton balanced chemical equation, what will the equation below? coefficient and symbol for fluorine be? AlCl 3 + NaOH → Al(OH) 3 + NaCl nitrogen trifluoride → nitrogen + fluorine A 1,3,1,3 A 3F B 3,1,3,1 B 6F 2 C 1,1,1,3 C F 3 D 1,3,3,1 D 6F E 3,1,1,1 E 3F 2
Slide 7 / 62 Slide 8 / 62 7 What are the missing coefficients for the skeleton 8 Aluminum chloride and bubbles of hydrogen gas equation below? are produced when metallic aluminum is placed in N 2 + H 2 → NH3 hydrochloric acid. What is the balanced equation for this reaction? A 1,1,2 A H + AlCl → Al + HCl B 1,3,3 B 2Al + 6HCl → 2AlCl 3 + 3H 2 C 3,1,2 C Al + HCl 3 → AlCl 3 + H D 1,3,2 D Al + 2HCl → AlCl 2 + H 2 E 2,6,6 E H 2 + AlCl 3 → Al + 2HCl Slide 9 / 62 Slide 10 / 62 9 What does the symbol in a chemical equation 10 When the equation, Fe + Cl 2 → FeCl 3 , is balanced, mean? what is the coefficient for Cl 2 ? A heat is supplied to the reaction A 1 B a catalyst is needed B 2 C yields C 3 D precipitate D 4 Slide 11 / 62 Slide 12 / 62 11 When the following equation is balanced, what is 12 Chemical reactions _____. the coefficient for HCl? Mg(s) + HCl(aq) → MgCl 2 (aq) + H 2 (g) A occur only in living organisms B create and destroy atoms A 6 C only occur outside living organisms B 3 D produce new substances C 1 D 2
Slide 13 / 62 Slide 14 / 62 13 Which of the following is NOT a true statement 14 Chemical equations _____. concerning what happens in all chemical reactions? A describe chemical reactions B show how to write chemical formulas The ways in which atoms are joined together are A C give directions for naming chemical compounds changed. D describe only biological changes B New atoms are formed as products. C The starting materials are named reactants. The bonds of the reactants are broken and new D bonds of the products are formed. In a word equation representing a chemical reaction, E the reactants are written on the left and the products on the right. Slide 15 / 62 Slide 16 / 62 15 A skeleton equation does NOT show which of the 16 Chemical equations describe _____. following? A nuclear reactions A the correct formulas of the reactants and products B electrochemical processes C chemical reactions B the reactants on the left, the products on the right D biological reactions all of the above C an arrow connecting the reactants to the products E D the physical states of the substances E the relative amounts of reactants and products Slide 17 / 62 Slide 18 / 62 17 Chemical equations must be balanced to satisfy 18 Symbols used in equations, together with the the _____. explanations of the symbols, are shown below. Which set is correct? A law of definite proportions A (g), grams B law of multiple proportions B (l), liters C law of conservation of mass C (aq), dissolved in water D principle of Avogadro D (sp), solid product E (lq), liquid
Slide 19 / 62 Slide 20 / 62 19 In the chemical equation, H 2 O 2 (aq) → H 2 O(l) + O 2 20 A catalyst is _____. (g), the H 2 O 2 is a _____. A the product of a reaction A product B a reactant B reactant C one of the reactants in single-replacement reactions C catalyst D a solid product of a reaction D solid a chemical that speeds up the reaction E E gas Slide 21 / 62 Slide 22 / 62 22 Which of the following is the correct skeleton 21 When the following equation is balanced, KClO 3 equation for the reaction that takes place when (s) → KCl(s) + O 2 (g), the coefficient of KClO 3 is solid phosphorus combines with oxygen gas to _____. form diphosphorus pentoxide? A 1 A P(s) + O 2 (g) → PO 2 (g) B 2 B P(s) + O(g) → P 2 O 5 (g) C 3 C P(s) + O 2 (g) → P 2 O 5 (g) D 4 D P 2 O 5 → P 2 (s) + O 2 (g) E 6 E P 2 (s) + O 5 (g) → P 2 O 5 (g) Slide 23 / 62 Slide 24 / 62 24 When potassium hydroxide and barium chloride 23 In every balanced chemical equation, each side of react, potassium chloride and barium hydroxide the equation has the same number of _____. are formed. The balanced equation for this reaction is _____. A atoms B molecules A KH + BaCl → KCl + BaH C moles B KOH + BaCl → KCl + BaOH D coefficients C 2KOH + BaCl 2 → 2KCl + Ba(OH) 2 E subscripts D KOH + BaCl 2 → K+ BaOH E 2KOH + 2BaCl 2 → 2KCl 2 + 2Ba(OH) 2
Slide 25 / 62 Slide 26 / 62 25 The double arrow symbol indicates _____. 26 If a combination reaction takes place between potassium and chlorine, what is the product? A that heat must be applied A KCl B an incomplete combustion reaction B KCl 2 C that a gas is formed by the reaction C K 2 Cl D that the reaction is reversible D PCl E PCl 2 Slide 27 / 62 Slide 28 / 62 27 The product of a combination reaction is Ba(OH) 2 . 28 Write a balanced equation for the combination If one reactant was H 2 O what was the other reaction that takes place when iron(III) oxide is reactant? formed from its constituent elements. A Ba 2 O A Fe 2 + O 3 → Fe 2 O 3 B BaO B 2Fe + 3O → Fe 2 O 3 C BaH C 4Fe + 3O 2 → 2Fe 2 O 3 D BaO 2 D 3Fe + O → Fe 3 O E Ba 2 O 7 E Fe + O 3 → FeO 3 Slide 29 / 62 Slide 30 / 62 29 The reaction, 2Fe + 3Cl 2 → 2FeCl 3 , is an example 30 Write a balanced equation to represent the of which type of reaction? decomposition of lead(IV) oxide. A combustion reaction A PbO 2 → Pb + 2O B single-replacement reaction B PbO 2 → Pb + O 2 C combination reaction C Pb 2 O → 2Pb + O D decomposition reaction D PbO → Pb + O 2 E 2PbO → 2Pb + O 2
Slide 31 / 62 Slide 32 / 62 31 What is the balanced equation for the reaction that 32 The equation Mg(s) + 2HCl(aq) → MgCl 2 (aq) + H 2 is takes place between bromine and sodium iodide? an example of which type of reaction? A Br 2 + NaI → NaBr 2 + I A combination B Br 2 + 2NaI → 2NaBr + I 2 B single-replacement Br 2 + 2NaI → 2NaBr + 2I - C C decomposition D Br + NaI 2 → NaBrI 2 D double-replacement E Br + NaI 2 → NaBr + I 2 Slide 33 / 62 Slide 34 / 62 33 What are the correct formulas and coefficients for 34 The equation H 3 PO 4 + 3KOH → K 3 PO 4 + 3H 2 O is an the products of this double-replacement reaction? example of which type of reaction? RbOH + H 3 PO 4 → A double-replacement A Rb(PO 4 ) 3 + H 2 O B combination B RbPO 4 + 2H 2 O C decomposition C Rb 3 PO 4 + 3H 2 O D single-replacement D H 3 Rb + PO 4 OH E 3RbH + H 2 OPO 4 Slide 35 / 62 Slide 36 / 62 35 When the equation for the complete combustion of 36 The equation 2C 3 H 7 OH + 9O 2 → 6CO 2 + 8H 2 O is ethanol, C 2 H 5 OH, is balanced, what is the an example of which type of reaction? coefficient for oxygen? A combustion A 1 B single-replacement B 3 C double-replacement C 6 D decomposition D 7 E 14
Slide 37 / 62 Slide 38 / 62 37 Which of the following is NOT true concerning the 38 Which of the following statements is true decomposition of a simple binary compound? concerning single-replacement reactions? A The products are unpredictable. A They are restricted to metals. B The products are the constituent elements. B They involve a single product. C The reactant is a single substance. C They involve a single reactant. The reactant could be an ionic or a molecular D Any metal replaces any other metal. D compound. E They are also called displacement reactions. E Energy is usually required. Slide 39 / 62 Slide 40 / 62 39 In order to predict whether or not a single- 40 In the activity series of metals, which metal(s) will replacement reaction takes place, we need to displace hydrogen from an acid? consult a chart which shows the _____. A any metal A periodic table B only metals above hydrogen B activity series of metals C only metals below hydrogen C common polyatomic ions D only metals from Li to Na D ionic charges of representative elements E only gold formulas and names of common metal ions having E an ionic charge greater than 1. Slide 41 / 62 Slide 42 / 62 41 Which of the following reactions will NOT take 42 Use the activity series to write a balanced place spontaneously in the direction written? chemical equation for the following single replacement reaction: Ag(s) + KNO3(aq) → A Cu + HCl → A Ag(s) + KNO 3 (aq) → AgNO 3 + K B Ca + Pb(NO 3 ) 2 → B Ag(s) + KNO 3 (aq) → AgK + NO 3 C Ag + AuCl 3 → C Ag(s) + KNO 3 (aq) → AgKNO 3 D Zn + HNO 3 → D Ag(s) + KNO 3 (aq) → Ag + K + NO 3 E K + H 2 SO 4 → No reaction takes place because silver is less E reactive than potassium.
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