Balance Equations and Predict Reactions Worksheet Key, Exercises of Chemistry

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Name�KJ�P�tl..__________

Reaction Prediction Date __-:i_______

-{rO<"cle.� -ones o.-e �Mp\e� �ou �on lf- nud +o bf a.k>te t-o do

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In each of the following examples: (a) State what type of reaction is expected. (b) Tell whether the reaction will occur or not, and why. (e) Write the balanced equation for those reactions that do take piace; write the symbols and formulas of the reactants for those reactions that do occur.

X Indicate whether double replacement reactions are reversible o; irreversible.

SR^ 1. aluminum plus hydrochloric acid 21\ay,l-\C�� zAICficog;3"1u3) 'De,_ 2. calcium hydroxi& plus nitric acid (^11)

/;")^ Co. (o H),. (Cli)^ ..,^ 2.-l^ NO^ ?,e�^ Co. (N01h-tt!^ Z^ r,O"<..e>

S. .:;,I aluminum plus"magnesium.^ O'^ O'

A\ -+ t-"� ➔ NR

SR 4. magnesium plus zinc nitrate

M 'àn�^ Zn[NO�)"C•V^ �j(N01),_^ ca'L) +^ z,,,^ s)

S 5.^ mercury plus oxygen

2�t 0¼9)-.,^ ZHqOc�)

t>R 6.^ zinc chlonde plus hydrogeYi sulfìde °b"LllfQ� .h.�,.; 'Zn s,�)-+ 2H c,(°1)) S 7. dinitrogen pentoxide plus water N2.Os +^ \·h_O� 2HND! � 8.^ silver chloride plus sodium nitrate �q -+^ ��N0 3 �^ �tJl>l^ ➔ No.a^ � does"'+ "�.\l, o� _blc �e.I ;s So ,d 1:) 9.^ sodium chlorate (heated) 2."1�00� � 2. tJ"'c.t "''\02.

� 1 O.^ barium nitrate plus sodium chromate 1òo.(N0,) 1 ... No.1.u-Oq �^ {¼u-Oq � 2.NQ.N

�11. sodium bromide plus silver nitrate No.�v- � ��e� ➔ �N01 .. �Br

12. calcium phosphate plus aluminum sulfate � C.O.;(P0�1. ..^ l'1..^ (SoCV^3 � 3(oS

• 2 A\ PO'f

13. zinc carbonate (heated) t> (^) ZnCD1» -., -Z.nO -+ (1)1...
14. mercury(I) sulfate plus ammonium nitrate

N

� -\�i.^ ço�^ +^ 1-J""^ N� ➔^ (w�'I)�<;oli^ --1^ \'l^ o^^3

45

(continued) @ Chemistry Problems

Reaction Prediction (continued)

Name ___________ Date ____________

5 15. potassium plus fluorine 2.1< + F2 _., 2(F

t)(l16.^. potassium nitrate plus zinc �<NO �hospha�e !, -+^ Ùl�[PO&t)2. ➔^ K?t?Oc.\ -t-:,z.V(ND�z. S 17. lithium oxide plus water Liz. O ➔ .h.O � 2.Ll o t> 18. sodium chloride (electrolyzed) 'Z.fl.Jo.C.1 ➔ 2--No- + e '1.. S @^ silver plus barium A<3 -t Be>..➔ Ntt.

20. iron(III) hydroxide plus phosphoric acid (^11) 1>'2-^ C^ -' te- ( ott)� -t \·h. P°'-t -:>^ 'fe.t

(^) o LI "" 3 n

21. sodium plus nitric acid 1:,(1.. (^) -i.No..+ 2,\NO!> 4 2.w�tJ<h -t- -H
22. iron(III) iodide plus cupric nitrate c.upri c. :: c1>pper (11)

�(t. 2fe:!� +$(.�(NO�-'> z.re(ND�'^ -t^ 3C1.t:C2.

23. copper plus sulfuric acid c;(l. ù" +^ \·b..^ SDq^ -»^ f'J 12..
24. lead plus potassium chlorate 51L. (^) 'Pb-+ KC.\01, -.::, N�
25. sulfur dioxide plus water

S SOi. -t 1--�o -> -hSO:!i.

@ oxygen plus sulfur s.^ - o·�+ s � �c.,-..

27. sodium sulfate plus barium chloride "Dq.. (^). NG\ '2. so� -+ Ba.Cb. � 1?> o. SO 4 + ztJo.. C. I
28. ammonium phosphate plus lithium hydroxide bq.. (^) (N-\l)�rol.\ + 3uO-\ � �N-\q()� -t W'3PO�
29. hydrogen plus oxygen s (^) 2-\ (^) 'I.-- + o� ➔ 2-h.O
30. mercury plus nitric acid s. t2- (^) -\� _.. -\ N 03 ➔ l-l�
31. sodium oxide plus water s (^) No..,O -tt-\1.O -==, 21'-.lo.O.\
32. calcium carbonate plus lithium chloride

t>� Co..C03+2L.:,C\ � Co.C..l l, .... Uf-

(continued) @ Chemistry Problems

)

Reaction Prediction (continued)

Name ___________ Date ___________

51. potassium hydroxide plus hydrosulfuric acid

bR 2 KO\ -+ " ,. � � K2.� ... 2Hol-\

52. sodium carbonate plus sulfuric acid •l·h.l,b1 �o.J::.� into �ho +(i).,_

UR N().."2-(0i -4- H,�'f -, N�,Sb 4.,. \·h.O^ +^ Co).

53. barium sulfate plus calcium chloride t>'1- �o So� + C.o..C.l -a. � �e,� .,. Cb.SD (^) c.,
54. silver plus mercury(I) nitrate s� (^) f\� + -\�NO� ➔ NR
55. barium carbonate (heated) b Bo.C0 1 ➔ &,_O+ (.OL
56. lithium plus bromine S ZU + � ...� � 2.LiP-,r
57. sodium chloride plus potassium chromate t:,e.. 2.NoC I � Ki.C.r 04 _:,, No.�u04 -t '2.. (C: 1
58. potassium sulfide plus iron(II) nitrate t)(Z.. ('2, e; -+ Fe (NO�)'l. -., 2.KNO�^ 't^ Fc. S
59. iodine plus ammonium fluoride �9.- "I.� -+ N-\ (^) '1 F ➔ N�

@) sodium plus calcium

s Nq..+ Co..� Nft

61. aluminum chloride (electrolyzed)

1> zJ\ \C\ :!. -:io, 2A l -+ 3 C\2.

62. lead(II) chlorate plus sodium sulfide � 'Pb^ (C.103)-i.^ +^ No.^ i.^ S -"^ 'Pb �^ -t.^ l.N°'CIO)
63. sulfur trioxide plus water .S (^) so� ➔ --1..0 -'!I> -h.SOq
64. calcium carbonate plus hydrochloric acid �(t. (^) to.tol + 2 �Cl � Co.Cli -+ f-110 .. COi,
65. iron plus sodium bromide

se.. te 1- No.Br 4 NR

66. ammonium acetate plus iron(II) chloride

t>Q. 2 N\"la.HlO� + Fect� � 2N\qCI + Fe(C2.H10 ..),

67. silver bromide plus ammonium sulfate

bo. A�'òr^ +^ (N-\q)'l-^ �^ "f^ ➔^ *A�,so'*^ +^ NHqSr^ •doesr,'-1- veCl..11'1 �appen

68. zinc plus sulfuric acid St- 'Z."'""' �� _<;cl.\ ., (^) z."�'f t' H t (continued)^ @ 48 Chemistry Problems

Reaction Prediction (continued)

@. neon plus potassium � Ne- -t �^4 Nit @ (^) iron plus potassium iodide �� Fe 4- KI ➔ Nl

71. lead(II) hydroxide plus hydrochloric acid

btt.. V'o lo�ì� -\1.-\C.\ ➔ 'Pbt\1. � l"C>"'

72. iron plus sulfur s fe -t � _,, fc.S
73. potassium chlorate (heated) l) 1.KC\01. 4 l.KCl -t- Q oxygen plus chlorine ..s Z.02. + Cl2. ➔ 2.CI0 2

Name ___________ Date ___________

75. silver iodide plus iron(III) sulfìde tR <r,A^^1 ..^ Fei. S 3 ➔3A�'1-$ -..1FeJ: �^ ""dotsn'+ nc.+ua.H'i ho.ppen
76. iron�I) carbonate plus phosphoric acid

t>tL 3feC.0!, + 2�) l'b^4 �^ �3lf'D�2.^ 1-^ 3\·h.O^ -+ 3Cb1.

77. potassium iodide plus ammonium nitrate t>� KI. .,. N� NO!a ➔ k.NO� -t NW� I:
78. potassium plus sodium nitrate (heated) SIL (^) (. +. Na t>JlJ� -!> \QJ0.1 + ��
79. bromine plus sodium chloride Sft. Sra. ➔ N� C..I � NR
80. silver sulfide plus hydrochloric acid t)� (^) � 1,<;^ +^ z�c1^ ➔^ 2.Asc,^ � "�s
81. m;��esium nitrate plus hydrochloric acid

b<2- ��(tJD��Z\CI ➔ f,.,{�Cli.. +^ 2-\ND�

@ ammonia plus hydrogen chloride *� N\3 + ,IC* ➔ NHyCI

83. zinc hydroxide plus sulfuric acid *� 2Y* lotth + "1.�o"I ➔ "'2."' S°'-\ -+ 2.\0"
84. calcium o:xide plus water s Co.O ➔ \h...O ➔ CQ.(OH)"'-
85. sodium plus chlorine � 2N" -+ c.11- _, 2No..t \
86. calcium hydroxide (heated)

t> Co. ( D�)l ➔ 0AO -t \

(continued) @ Chemistry Problems