Laporan Sementara Prak 2 (rikha Fauziah Azzahra)

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LAPORAN SEMENTARA PRAKTIKUM 2 STANDARISASI LARUTAN KERJA

Konsentrasi (M) Larutan

Mulamula

Terukur

Volume (mL)

Larutan

Konsentrasi (M)

20,9 NaOH

0,1016

21,0

0,0960

10 Asam Oksalat

0,1005

20,9 Rata-rata

0,1

20,933

0,0851

23,2

Rata-Rata Natrium Tetraborat

0,0987

0,1

23,2

0,0941

10,9

Rata-Rata

10 10

NaOH

0,1016

10,8 Rata-Rata

10 10

10,7 CH3COOH

10 10

23,1 Rata-Rata

10 10

23,3 HCl

Volume (mL)

10 10

10,8

Rata-Rata

10

PERHITUNGAN 1.

Konsentrasi larutan NaOH terukur yaitu 0,0960 M Titrasi NaOH dengan Asam Oksalat NaOH

= Asam Oksalat

ValensiNaOH x MNaOH x VNaOH = ValensiAs.Oksalat x MAs. Oksalat x VAs. Oksalat 1 x MNaOH x 20,9333 mL = 2 x 0,1005 M x 10 mL MNaOH MNaOH

=

2 𝑥 0,1005 𝑀 𝑥 10 𝑚𝐿 1 𝑥 20,9333 𝑚𝐿

= 0,0960 M

2.

Konsentrasi larutan HCl terukur yaitu 0.0851 M Titrasi HCl dengan Natrium Tetraborat HCl

= Natrium Tetraborat

ValensiHCl x MHCl x V HCl = ValensiNat.Tetraborat x M Nat.Tetraborat x V Nat.Tetraborat 1 x MHCl x 23,2 mL

3.

= 2 x 0,0987 M x 10 mL 2 𝑥 0,0987 𝑀 𝑥 10 𝑚𝐿

MHCl

=

MHCl

= 0,0851 M

1 𝑥 23,2 𝑚𝐿

Konsentrasi larutan CH3COOH terukur yaitu 0,0981 M Titrasi CH3COOH dengan NaOH CH3COOH

=

NaOH

ValensiCH3COOH x MCH3COOH x VCH3COOH = ValensiNaOH x M NaOH x VNaOH 1 x MCH3COOH x 10,8 mL

= 2 x 0,1016 M x 10 mL 2 𝑥 0,1016 𝑀 𝑥 10 𝑚𝐿

MCH3COOH

=

MCH3COOH

= 0,0941 M

1 𝑥 10,8 𝑚𝐿

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