J"i"nce
\'
l0 Worksheet- Writing and Balancing
Equations
Balancethe following and indicatethe
correctphaseof eachsubstance.
1
B'
Name:
.
?
NaoHrqr---l-
H2sr11
)
oz,,
-;,
2.
--1- F.rr1 *
3'
7L[ NH:,' *
4.
L
Callrorei+l3
5.
Z
Al,r., +
6.
a
Nor51 *
7.
I
6rcor,fi_l_Sr(Nor)2,.1) )
8'
I
czHr+,,)
3
1
I Na2Sc.*, +
z
2 Hzor,)
Fe2o3 6ry
o, ,r.,
)
4t{Noz,r>
*
74 Hzorgr
ozrs)
t
t8 cozci
+
?roHzorsr
I
cr2o3j,1
)
I
*
Z
I
oz .,>r
)
72Noz re)
? KNo3<.21*
|
)
/
ar11s<r) +
Alzo:csl
3
Hzts)
Write and balancethe equationsfor the following chemicalreactions.
z '|}.Cr,l
LH.c5)r I C.,"1
2.
methane+ oxygen ) carbondioxide+ water
, rr)
l - C l ^ l qo, rZ) o r . , 5 r i I C c a , o ; * 2 s 1D
3.
nitrogen+ hydrogen) ammonia
I t r . , r r *J 4 z - , 5-ta 3 N f t 3 , 6 )
4.
potassium
chlorate) oxygen+ potassium
chlonde
1f A01c,il -r 2 Or,* t 3V-L\ c^y)
5.
sulfur+ oxygen) sulfur dioxide
| 9zrr, +i
6.
Crro,
mercury(Il)oxide ) mercury+ oxygen
Lt15Oo -:$5,,,+
1.
.,
.*_) b 5D..2;
lCr'")
zinc + hydrochloncacid ) zinc chloride+ hydrogen
I.Zn rr+3*Cl,-21 a
I ? - . ,C l . c * 2 1/ J - H - r r 1
crcr
srcorc5l
8.
hydrogen+ chlorine ) hydrochloricacid
i
rr,l| lr
I W2t9l + -l- L lrG)
9'
\r rl
iFC \.u 2
aluminum sulfate+ calcium hydroxide ) aluminum hydroxide + calcium sulfate
I
10.
--7 1"!
Al7i.5o"1)r.o, r 2 cd(Itt)z u2>-j ? *l/ol,\rrn
silvernitrate+ sodiumiodide) siiveriodide+ sodiumnitrate
L n}vo 3eo2)rllv c..r r9., -a 1 4.: T r,; *l11.
r J (c,501,,r
lvct\frt cZ)
iron and calcium nitrateform iron(IJQ;ritrateand calcium
TFe(s) r 7 cuQor)".o"r^ -? 1 F* ('ar)t,z>r ) Curr2
12.
calciumchlorideandsodiumcarbonate
form sodiumchlorideandcalciumcarbonate
LCoC\a(,.s-1+ J_ ruotCDgu2;*a Z
13.
7
15.
ts)
aluminumhydroxide ) aluminum oxide and water vapour
L*t GH)ss) J
g
(baclrz)n\(o(Ot
Lr+\ *dl (s)r -3 f+oH.^)
diborontrioxidepluswaterformsboric acid
-(\^o-) ,,1*H-oc,; 4 -
-r
o 01(
dinitrogenpentaoxide) nitrogendioxide + oxygen
1 f Va A g ( : ) - a { N O : 1 s ) t J - o \ r ; )
16.
lithium plus nitrogenforms lithium nitride
L Lt(s>r!,u, /6) a 2 Ltul$, s;
17.
beryllium fluoride plus water forms beryllium hydroxide plus hydrofluoric acid
+-^W::i
J_BeFt{>)
18.
f Lh€(o+t),r,,
Al-l F,o71
aluminumplus silver nitrate forms aluminum nitrate plus silver
)Al,rt nJ4eMo7a2;
AA( Not hz>t ' utrr,
19.
tetraphosphorus
decaoxideplus water forms phosphoricacid
L ? r o r o r > >* b U r - o c D
firtorz)