Tugas Kimia Fani Xi Ipa 2 Absen 15.docx

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1. Data percobaan laju reaksi NO (NO) MOLAR 1 0.10 2 0.10 3 0.20 4 0.30 Berdasarkan data diatas orde reaksi total adalah

(Br2) MOLAR 0.15 0.30 0.30 0.45

a. 0

d. 3

b. 1.

C. 2

LAJU REAKSI 12.10-2 24.10-2 96.10-2 48.10-2

e. 4

Jawab : 0,1 π‘₯

24.10βˆ’2

ο‚·

[0,2] = [96.10βˆ’2 ]

ο‚·

[ 2]

ο‚·

x =2

ο‚·

[ 0,3 ] = [24.10βˆ’2 ]

ο‚·

[ 2]

ο‚·

y=1

1 π‘₯

=

1 4

0,15 𝑦 1 𝑦

=

12.10βˆ’2

1 2

jadi reaksi totalnya adalah x + y = 2 + 1 = 3 D

2. berikut ini diberikan data percobaan laju reaksi Q + 2T T2Q NO 1 2 3

Q 0.1 0.2 0.1

T 0,1 0.1 0.2

V(M/DET) 1.25 X 10-2 5 X 10-2 10-1

Jika Q dan T masing masing diubah mendjadi 0.5 M maka harga laju reaksinya saat itu adalah? a. 0.5

b. 7,5

Jawab : 0,1 π‘₯

1,25.10βˆ’2 ] 5.10βˆ’2 1 4

ο‚·

[0,2] = [

ο‚·

[ 2]

ο‚·

x =2

1 π‘₯

=

c. 10.5

d. 12.5

e. 39.0

0,1 π‘₯

ο‚·

[0,2] = [

ο‚·

[ 2]

ο‚·

y=3

1 π‘₯

1,25.10βˆ’2 ] 10βˆ’1

= 0.125

jadi persamaan laju reaksinya V=K [𝑄]2 [𝑇]3 Jika Q dan T dikalikan 5x semula V = k [5𝑄]2 [5𝑇]3 = 55 K [𝑄]2 [𝑇]3 = 3125 v = 3125 x 1,25 x10-2 = 39 M/det Jadi harga laju reaksinya 39 M/det e

3. pada reaksi kesetimbangan PCl3 + Cl2 ` PCl5 diperolah data sbb: [𝑃𝐢𝑙3 ] 𝑀 [𝐢𝑙2 ] 𝑀 ο‚· [𝑃𝐢𝑙5 ] 𝑀 1 3 3 Jika tekanan total reaksinya adalah 7, harga KP dari reaksi tsb adalah a. 1/9 b. 1/6 c. 1/3 Jawab : Mol 𝑃𝐢𝑙5 = 1 π‘šπ‘œπ‘™ mol 𝑃𝐢𝑙3 = 3 mol 𝑛 𝑃𝐢𝑙3

PCl3 =

KP =

𝑛 π‘‘π‘œπ‘‘π‘Žπ‘™

π‘₯ 𝑃 π‘‘π‘œπ‘‘π‘Žπ‘™ =

3 7

π‘₯ 7 = 3 π‘Žπ‘‘π‘š

PCl5 =

𝑛 𝑃𝐢𝑙5 𝑛 π‘‘π‘œπ‘‘π‘Žπ‘™

π‘₯ 𝑃 π‘‘π‘œπ‘‘π‘Žπ‘™ =

1 7

π‘₯ 7 = 1 π‘Žπ‘‘π‘š

Cl2 =

𝑛 𝐢𝑙2 𝑛 π‘‘π‘œπ‘‘π‘Žπ‘™

π‘₯ 𝑃 π‘‘π‘œπ‘‘π‘Žπ‘™ =

3 7

π‘₯ 7 = 3 π‘Žπ‘‘π‘š

[𝑃𝐢𝑙5 ] [𝑃𝐢𝑙3 ] [𝐢𝑙2 ]

=

1 3π‘₯3

=

1 9

d. 1

e. 3

mol 𝐢𝑙2 = 3 π‘šπ‘œπ‘™

4. Dalam ruang 5L direaksikan 0,5 mol gas N2 dengan 0,4 mol gas O2 menurut reaksi N2 + O2 2NO Setelah tercapai kesetimbangan, terbentuk 0.2 mol gas NO. harga Kc adalah a. 1/2 b. 1/3 c. 1/4 d. 1/5 e. 2/3 Jawab : N2 + O2

2NO

Mula2

0.5

Reaksi

0,1

0,1

0.2

Hasil akhir

0.4

0.3

0.2

Kc=

[0.2/5]2 [0.4/5] [0.3/5]

0.4

=

0,2 π‘₯ 0,2 0.4 π‘₯ 0.3

-

=

1 3

𝑏

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