TA - MODUL VI (23/04/2022)

What is the definition of acidimetri ?

• The process of measuring the amount of base in a solution, with a acid standard solution by titration.

• The process of measuring the amount of acid in a solution, with a basic standard solution by titration.

• The process of measuring the amount of acid in a solution, with a basic standard solution by gravimetry.

• The process of measuring the amount of acid in a solution, with a basic standard solution by dillution.

What is the meaning of standard solution ?

• a standart is a solution containing a precisely known concentration of an element or a substance.

• a standart is a solution containing a precisely known concentration of an element or a substance by titration.

• a standart is a solution containing a unprecisely known concentration of an element or a substance.

• a standart is a solution containing a precisely known concentration of an element or a substance by dillution.

A 15 ml solution of 0.8 M HCl is titrated until neutralized into a 70 ml sample of NaOH. What was the concentration of the NaOH

• 0.14 M

• 0.15 M

• 0.16 M

• 0.17 M

Titration reveals that 11.6 mL of 3.0 M sulfuric acid are required to neutralize the sodium hydroxide in 25.00 mL of NaOH solution. What is the molarity of the NaOH solution

• 2.8 M

• 2.9 M

• 3 M

• 3.1 M

How much the volume in this burette ?

• 0.10 mL

• 0.11 mL

• 0.12 mL

• 0.13 mL

From the primary standard solution below,which one the primary standard solution for acid-alkalimetric titration ?

• Potassium Dichromate

• Sodium Thiosulphate

• Potassium Hydrogenphtalate

• Sodium Metabisulfite

What is the requirement for primary standard solution ?

• The substance should be unaltered in air during weighing.

• The substance should be hygroscopic.

• The substance should be hard to obtain.

• The substance should have less molecular weight.

How to make Methyl Orange indicator ?

• Dissolve 0.1 gr of Methyl Orange in 100mL of distilled water.

• Dissolve 0.1 gr of Methyl Orange in 100mL of ethanol.

• Dissolve 0.5 gr of Methyl Orange in 100mL of distilled water.

• Dissolve 0.5 gr of Methyl Orange in 100mL of ethanol.

How to make Phenolphtalein indicator ?

• Dissolve 1 gr of Phenolphtalein in 40mL 2-ethoxyethanol and dillute to 100mL with distillate water.

• Dissolve 1 gr of Phenolphtalein in 40mL 1-ethoxyethanol and dillute to 100mL with distillate water.

• Dissolve 1 gr of Phenolphtalein in 60mL 2-ethoxyethanol and dillute to 100mL with distillate water.

• Dissolve 1 gr of Phenolphtalein in 60mL 1-ethoxyethanol and dillute to 100mL with distillate water.

How to make Sodium Tetraborate Pentahydrate 2.5N 250ml

• 0.3641 gr

• 1.3641 gr

• 0.7282 gr

• 1.7282 gr