Page 62 - الكيمياء كتاب الطالب للصف 11 الفصل 1

a Fa ] £`q z5 0-a c>Va ¿ 1:M w, &a W>a ¿ ² yfy^a

ÎC

¤ Û ^'± ³¹b b: ± (CaO) Ïb= C8 ± P= ­ ´„b ¹P D ± ˜¢

E Š± E C c9 R<3= –56.1 c9 2.9 _ 7 C P; E= b: ± E9 8 ± Э C Õ :9 –Ïb= C8 ± P= ­ ` 2.9 g d
ÏC »M± ` Û^ M± ¹P4 ± Э 0.051693 ¹P4 ± E C ± 56.1 g/mol ÔÒC Ïb= C8 ± P= M

ÔÒC E9 8 ±’ 2 b ³C24: ± ´C C= ± d E b;4: ±
N 0 –`=K b;4 `= Ø: » ] C ¯ ^: Э D ±Q ˜“2.9 g
˜0.052 mol

α@

˜(SiCl ) (IV) Ðb8=9= ± P »b9 ` 340.2 g ` b8 (Cl ) »b98 ± ` 284.0 g Z (Si) Ðb8=9= ± ` 56.2 g ^ C6 Ÿ
4 2
˜^ C6 ± E ¹C4 D ± ˜^ C6 9 dgC=:=8 ± D C; ± ¹C ˆ ´C b94: ± ÑQ ÏP ±

E=9 8 ± E b : ± E ; ±

Percentage composition E=9 8 ± E b : ± E ; ± ²C E= ; ± E Û»Q ± ^ 8 ±Ò C DÛ R E5=j ϱP ± C;;8:

˜DÛ R: ± d `Û=4 R0;4 by mass

D R d `=4 R0; ´„b ¹P × E »Q ± E9 8 ±
100 × § (%) E=9 8 ± E b : ± E ; ±
D R:9 E= b: ± E9 8 ±

ÎC

§ (%) E=9 8 ± E b : ± E ; ± d ¹b b: ± P P 9 E=9 8 ± E b : ± E ; ± D ± ˜£
.(Fe O ) (III) P P ± P= ­ D R
55.8 × 2 2 3
100 × § 69.9 %
(2 × 55.8) + (3 × 16.0)
¤ Û ^'±
¹P ¹C ˆ E=gC=:=8 ± E5=0 ± ÏP ± ¤› ³b2 ±
˜(Fe O ) ` P ±Ò Îb d P P ± ´„b
2 3
(Fe O ) d P P 2 mol P b
2 3
E b : ± E ; ± D E ¹C4: ± ÏP ± ¤œ ³b2 ±
˜E=9 8 ±

100(%) × D R d `=4 R0; ´„b ¹P × E »Q ± E9 8 ±

Fe O êmA ëÌ x[™w émšdTÐ ‹X D R:9 E= b: ± E9 8 ±
2 3
zwzœTÐ ‹X 69.9% o—–h ŽcK œw

α@

˜(C H OH) Îb C ˆ± d ¹b b: ± Ðb R89 E=9 8 ± E b : ± E ; ± D ±
2 5

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