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MolaRitas

MolaRitas. 1. Buatlah larutan NaCl 0.5 M dalam 250 ml air ( Ar Na= 23, Ar Cl = 35.5) 2. Buatlah larutan HCl 0.05 M sebanyak 250 ml dari HCl 1M. Rumus. M = gr X 1000 Mr v. Pengenceran V 1 M 1 = V 2 M 2. Hubungan Molaritas dengan kadar larutan

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MolaRitas

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  1. MolaRitas

  2. 1. BuatlahlarutanNaCl 0.5 M dalam 250 ml air ( Ar Na= 23, ArCl = 35.5) 2. BuatlahlarutanHCl 0.05 M sebanyak 250 ml dariHCl 1M

  3. Rumus M = gr X 1000 Mr v Pengenceran V1M1 = V2 M2 HubunganMolaritasdengankadarlarutan M = p x 10 x % Mr

  4. Pencampurandualarutan yang berbedakonsentrasi: n1+ n2 = n3 V1.M1 + V2.M2 = V3.M3

  5. LatihanSoal 1. HitunglahbesarnyamolaritasNaOH yang dibuatdenganmelarutkan 16 grNaOHdalam 250 ml air Jawab : 1.6 M 2.Hitunglah banyaknya K2Cr2O7 yang harusditimbanguntukmembuat 500 ml larutan K2Cr2O7 0.05 M (Ar K= 39, Ar Cr = 52, Ar O = 16 Jawab = gr

  6. Hitunglah volume yang diperlukanuntukmelarutkan 0.53 gr Na2CO3 untukmembuatlarutan Na2CO3 0.01 M Jawab : 500 ml • Hitunglahbeasarnyamolaritaslarutanasamnitrat yang mengandung 63% HNO3, massajenisnya 1.8 Kg L-1 Jawab : 18 M • Berapakah volume H2SO4 1M yang dibutuhkanuntukmembuat 250 ml larutan H2SO4 0.01M? Jawab : 2.5 ml

  7. Berapakah volume air yang ditambahkanpada 25 ml larutanHCl 2M untukmembuatlarutanHCl 0.5 M? Jawab : 475 ml • Berapakah volume larutanHCl 0.2 M yang dibuatdari 5.88 ml larutanHClberkadar 36.5% danmassajenisnya 1.7 kg L-1 Jawab : 500 ml • Berapakah volume air yang harusditambahkanpada 50 ml larutan HNO3 2M untukmembuatlarutan HNO3 0.5 M? Jawab : 150 ml

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