Slide 1 / 62. Slide 2 / 62. Slide 3 / 62 A 1,3,2,3 B 2,12,4,6 E 2,3,1,1 A 4,6,6,2 B 2,3,2,3 E 2,3,1,2 A 4,3,2,6 B 2,1,2,3 E 3,4,6,2

Transcription

1 1 What are the missing coefficients for the skeleton equation below? l 2 (SO 4 ) 3 (aq) + KOH(aq) l(oh) 3 (aq) + K 2 SO 4 (aq) Slide 1 / 62 1,3,2,3 2,12,4,6 4,6,2,3 1,6,2,3 2,3,1,1 2 What are the missing coefficients for the skeleton equation below? r(s) + Fe(NO 3 ) 2 (aq) Fe(s) + r(no 3 ) 3 (aq) Slide 2 / 62 4,6,6,2 2,3,2,3 2,3,3,2 1,3,3,1 2,3,1,2 3 What are the missing coefficients for the skeleton equation below? NH 3 (g) + O 2 (g) N 2 (g) + H 2 O(l) Slide 3 / 62 4,3,2,6 2,1,2,3 1,3,1,3 2,3,2,3 3,4,6,2

2 4 If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for iodine be? bromine + potassium iodide potassium bromide + iodine Slide 4 / 62 2I - I 2I I 2 2I 2 5 If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for fluorine be? nitrogen trifluoride nitrogen + fluorine Slide 5 / 62 3F 6F 2 F 3 6F 3F 2 6 What are the missing coefficients for the skeleton equation below? ll 3 + NaOH l(oh) 3 + Nal Slide 6 / 62 1,3,1,3 3,1,3,1 1,1,1,3 1,3,3,1 3,1,1,1

3 7 What are the missing coefficients for the skeleton equation below? N 2 + H 2 NH3 Slide 7 / 62 1,1,2 1,3,3 3,1,2 1,3,2 2,6,6 8 luminum chloride and bubbles of hydrogen gas are produced when metallic aluminum is placed in hydrochloric acid. What is the balanced equation for this reaction? Slide 8 / 62 H + ll l + Hl 2l + 6Hl 2ll 3 + 3H 2 l + Hl 3 ll 3 + H l + 2Hl ll 2 + H 2 H 2 + ll 3 l + 2Hl 9 What does the symbol in a chemical equation mean? Slide 9 / 62 heat is supplied to the reaction a catalyst is needed yields precipitate

4 10 When the equation, Fe + l 2 Fel 3, is balanced, what is the coefficient for l 2? Slide 10 / When the following equation is balanced, what is the coefficient for Hl? Mg(s) + Hl(aq) Mgl 2 (aq) + H 2 (g) Slide 11 / hemical reactions. Slide 12 / 62 occur only in living organisms create and destroy atoms only occur outside living organisms produce new substances

5 13 Which of the following is NOT a true statement concerning what happens in all chemical reactions? Slide 13 / 62 The ways in which atoms are joined together are changed. New atoms are formed as products. The starting materials are named reactants. The bonds of the reactants are broken and new bonds of the products are formed. In a word equation representing a chemical reaction, the reactants are written on the left and the products on the right. 14 hemical equations. Slide 14 / 62 describe chemical reactions show how to write chemical formulas give directions for naming chemical compounds describe only biological changes 15 skeleton equation does NOT show which of the following? Slide 15 / 62 the correct formulas of the reactants and products the reactants on the left, the products on the right an arrow connecting the reactants to the products the physical states of the substances the relative amounts of reactants and products

6 16 hemical equations describe. Slide 16 / 62 nuclear reactions electrochemical processes chemical reactions biological reactions all of the above 17 hemical equations must be balanced to satisfy the. Slide 17 / 62 law of definite proportions law of multiple proportions law of conservation of mass principle of vogadro 18 Symbols used in equations, together with the explanations of the symbols, are shown below. Which set is correct? Slide 18 / 62 (g), grams (l), liters (aq), dissolved in water (sp), solid product (lq), liquid

7 19 In the chemical equation, H 2 O 2 (aq) H 2 O(l) + O 2 (g), the H 2 O 2 is a. Slide 19 / 62 product reactant catalyst solid gas 20 catalyst is. Slide 20 / 62 the product of a reaction a reactant one of the reactants in single-replacement reactions a solid product of a reaction a chemical that speeds up the reaction 21 When the following equation is balanced, KlO 3 (s) Kl(s) + O 2 (g), the coefficient of KlO 3 is. Slide 21 /

8 22 Which of the following is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide? Slide 22 / 62 P(s) + O 2 (g) PO 2 (g) P(s) + O(g) P 2 O 5 (g) P(s) + O 2 (g) P 2 O 5 (g) P 2 O 5 P 2 (s) + O 2 (g) P 2 (s) + O 5 (g) P 2 O 5 (g) 23 In every balanced chemical equation, each side of the equation has the same number of. Slide 23 / 62 atoms molecules moles coefficients subscripts 24 When potassium hydroxide and barium chloride react, potassium chloride and barium hydroxide are formed. The balanced equation for this reaction is. Slide 24 / 62 KH + al Kl + ah KOH + al Kl + aoh 2KOH + al 2 2Kl + a(oh) 2 KOH + al 2 K+ aoh 2KOH + 2al 2 2Kl 2 + 2a(OH) 2

9 25 The double arrow symbol indicates. Slide 25 / 62 that heat must be applied an incomplete combustion reaction that a gas is formed by the reaction that the reaction is reversible 26 If a combination reaction takes place between potassium and chlorine, what is the product? Slide 26 / 62 Kl Kl 2 K 2 l Pl Pl 2 27 The product of a combination reaction is a(oh) 2. If one reactant was H 2 O what was the other reactant? Slide 27 / 62 a 2 O ao ah ao 2 a 2 O 7

10 28 Write a balanced equation for the combination reaction that takes place when iron(iii) oxide is formed from its constituent elements. Slide 28 / 62 Fe 2 + O 3 Fe 2 O 3 2Fe + 3O Fe 2 O 3 4Fe + 3O 2 2Fe 2 O 3 3Fe + O Fe 3 O Fe + O 3 FeO 3 29 The reaction, 2Fe + 3l 2 2Fel 3, is an example of which type of reaction? Slide 29 / 62 combustion reaction single-replacement reaction combination reaction decomposition reaction 30 Write a balanced equation to represent the decomposition of lead(iv) oxide. Slide 30 / 62 PbO 2 Pb + 2O PbO 2 Pb + O 2 Pb 2 O 2Pb + O PbO Pb + O 2 2PbO 2Pb + O 2

11 31 What is the balanced equation for the reaction that takes place between bromine and sodium iodide? Slide 31 / 62 r 2 + NaI Nar 2 + I r 2 + 2NaI 2Nar + I 2 r 2 + 2NaI 2Nar + 2I - r + NaI 2 NarI 2 r + NaI 2 Nar + I 2 32 The equation Mg(s) + 2Hl(aq) Mgl 2 (aq) + H 2 is an example of which type of reaction? Slide 32 / 62 combination single-replacement decomposition double-replacement 33 What are the correct formulas and coefficients for the products of this double-replacement reaction? RbOH + H 3 PO 4 Slide 33 / 62 Rb(PO 4 ) 3 + H 2 O RbPO 4 + 2H 2 O Rb 3 PO 4 + 3H 2 O H 3 Rb + PO 4 OH 3RbH + H 2 OPO 4

12 34 The equation H 3 PO 4 + 3KOH K 3 PO 4 + 3H 2 O is an example of which type of reaction? Slide 34 / 62 double-replacement combination decomposition single-replacement 35 When the equation for the complete combustion of ethanol, 2 H 5 OH, is balanced, what is the coefficient for oxygen? Slide 35 / The equation 2 3 H 7 OH + 9O 2 6O 2 + 8H 2 O is an example of which type of reaction? Slide 36 / 62 combustion single-replacement double-replacement decomposition

13 37 Which of the following is NOT true concerning the decomposition of a simple binary compound? Slide 37 / 62 The products are unpredictable. The products are the constituent elements. The reactant is a single substance. The reactant could be an ionic or a molecular compound. nergy is usually required. 38 Which of the following statements is true concerning single-replacement reactions? Slide 38 / 62 They are restricted to metals. They involve a single product. They involve a single reactant. ny metal replaces any other metal. They are also called displacement reactions. 39 In order to predict whether or not a singlereplacement reaction takes place, we need to consult a chart which shows the. Slide 39 / 62 periodic table activity series of metals common polyatomic ions ionic charges of representative elements formulas and names of common metal ions having an ionic charge greater than 1.

14 40 In the activity series of metals, which metal(s) will displace hydrogen from an acid? Slide 40 / 62 any metal only metals above hydrogen only metals below hydrogen only metals from Li to Na only gold 41 Which of the following reactions will NOT take place spontaneously in the direction written? Slide 41 / 62 u + Hl a + Pb(NO 3 ) 2 g + ul 3 Zn + HNO 3 K + H 2 SO 4 42 Use the activity series to write a balanced chemical equation for the following single replacement reaction: g(s) + KNO3(aq) Slide 42 / 62 g(s) + KNO 3 (aq) gno 3 + K g(s) + KNO 3 (aq) gk + NO 3 g(s) + KNO 3 (aq) gkno 3 g(s) + KNO 3 (aq) g + K + NO 3 No reaction takes place because silver is less reactive than potassium.

15 43 In order for the reaction 2l + 6Hl 2ll 3 + 3H 2 to occur, which of the following must be true? Slide 43 / 62 l must be above l on the activity series. l must be above H on the activity series. Heat must be supplied for the reaction. gas must be formed. 44 Which of the following statements is NOT true concerning double-replacement reactions? Slide 44 / 62 The product may precipitate from solution. The product may be a gas. The product may be a molecular compound. The reactant may be a solid metal. The reactant may be a binary ionic compound. 45 double-replacement reaction takes place when aqueous cobalt(iii) chloride reacts with aqueous lithium hydroxide. One of the products of this reaction would be. Slide 45 / 62 o(oh) 3 o(oh) 2 LiO 3 Lil 3 l 3 OH

16 46 What is the driving force in the following reaction? Ni(NO 3 ) 2 (aq) + K 2 S(aq) NiS + 2KNO 3 (aq) Slide 46 / 62 gas is formed. precipitate is formed. Ionic compounds are reactants. Ionic compounds are products. Heat is required. 47 In a double-replacement reaction. Slide 47 / 62 the reactants are usually a metal and a nonmetal one of the reactants is often water the reactants are generally two ionic compounds in aqueous solution energy in the form of heat or light is often produced 48 double-replacement reaction takes place when aqueous Na 2 O 3 reacts with aqueous Sn(NO 3 ) 2. You would expect one of the products of this reaction to be. Slide 48 / 62 NaNO 3 NaSn Sn(O 3 ) 2 NO 3

17 49 In a combustion reaction, one of the reactants is. Slide 49 / 62 hydrogen nitrogen oxygen a metal a binary ionic compound 50 The products of a combustion reaction do NOT include. Slide 50 / 62 water carbon dioxide carbon monoxide heat hydrogen 51 The complete combustion of which of the following substances produces carbon dioxide and water? Slide 51 / 62 8 H 18 K 2 O 3 aho 3 NO H 2 S

18 52 Which of the following is the correctly balanced equation for the incomplete combustion of heptene, 7 H 14? Slide 52 / 62 7 H O 7O + 7H2O 7 H O 2 7O + 7H 2 O 2 7 H O 2 14O H 2 O 7 H 14 + O 2 7 O 2 + 7H 2 7 H O 2 7O 2 + 7H 2 O 53 The type of reaction that takes place when one element reacts with a compound to form a new compound and a different element is a. Slide 53 / 62 combination reaction decomposition reaction single-replacement reaction double-replacement reaction combustion reaction 54 In a double-replacement reaction,. Slide 54 / 62 the products are always molecular the reactants are two ionic compounds the reactant is always oxygen the reactants are two elements the products are a new element and a new compound

19 55 Which of the following statements is incorrect? Slide 55 / 62 The only way to determine the products of a reaction is to carry out the reaction. ll chemical reactions can be classified as one of five general types. omplete combustion occurred when all the carbon in the product is in the form of carbon dioxide. single reactant is the identifying characteristic of a decomposition reaction. 56 What are the spectator ions in the reaction between KOH (aq) and HNO 3 (aq)? Slide 56 / 62 K + and H + H + and OH - K + - and NO 3 H + - andno 3 OH - only 57 The net ionic equation for the reaction between aqueous solutions of HF and KOH is. Slide 57 / 62 HF + KOH H 2 O + K + + F - HF + OH - H 2 O + F - HF + K + + OH - H 2 O + KF H + + OH - H 2 O H + + F - + K + + OH - H 2 O + K + + F -

20 58 ombining aqueous solutions of ai 2 and Na 2 SO 4 affords a precipitate of aso4. Which ion(s) is/are spectator ions in the reaction? Slide 58 / 62 a 2+ only Na + only a and SO 4 Na + and I - SO 2-4 and I - 59 Which ion(s) is/are spectator ions in the formation of a precipitate of gl via combining aqueous solutions of ol 2 and gno 3? Slide 59 / 62 o 2+ - and NO 3 NO - 3 and l - o 2+ and g + l - - NO 3 60 The balanced net ionic equation for precipitation of ao 3 when aqueous solutions of Na 2 O 3 and and al 2 are mixed is. Slide 60 / 62 2Na + (aq) + O 2-3 (aq) Na 2 O 3 (aq) 2Na + (aq) + 2l - (aq) 2Nal(aq) Na + (aq) + l - (aq) Nal(aq) a 2+ (aq) + O 2-3 (aq) ao 3 (s) Na 2 O 3 (aq) + al 2 (aq) 2Nal(aq) + ao 3 (s)

21 61 When aqueous solutions of gno 3 and KI are mixed, gi precipitates. The balanced net ionic equation is: Slide 61 / 62 g + (aq) + I - (aq) gi(s) g + (aq) + NO - 3 (aq) gno 3 (s) g + (aq) + NO - 3 (aq) gno 3 (aq) gno 3 (aq) + KI(aq) gi(s) + KNO 3 (aq) gno 3 (aq) + KI(aq) gi(aq) + KNO 3 (s) 62 When H 2 SO 4 is neutralized by NaOH in aqueous solution, the net ionic equation is. Slide 62 / 62 SO 2-4 (aq) + 2Na + (aq) Na 2 SO 4 (aq) SO 2-4 (aq) + 2Na + (aq) Na 2 SO 4 (s) H + (aq) + OH - (aq) H 2 O(l) H 2 SO 4 (aq) + 2OH - (aq) 2H 2 O(l) + SO 2-4 (aq) 2H + (aq) + 2NaOH(aq) 2H 2 O(l) + 2Na + (aq)