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Preparation of (250 mL of 0.1M) Standard Solution of Oxalic Acid
Preparation of (250 mL of 0.1M) Standard Solution of Oxalic Acid
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1)
What is the molar mass of oxalic acid (H2C2O4)?
126 g/mol
180 g/mol
90 g/mol
45 g/mol
2)
To prepare a 0.1M solution of oxalic acid, how many grams of oxalic acid would be required for 250 mL of solution?
22.5 g
3.15 g
9 g
90 g
3)
What is the formula for calculating the mass of the solute (m)?
m = M×V×Mm/1000
m = M+V+Mm/1000
m = M×V/Mm
m = M×V/1000
4)
What is the common name of oxalic acid?
Wood bleach
Ethanoic acid
Acetic acid
Tartaric acid
5)
If the molecular formula of oxalic acid is (COOH)2, what is the molarity of a 100 mL solution prepared by dissolving 63 g of oxalic acid in water?
1 M
0.25 M
0.5 M
2 M
6)
Which of the following is not the property of oxalic acid?
They are odourless
They are colourless
They are strong acid
They are crystalline
7)
Which of the following is a primary standard substance for standardizing the solution of oxalic acid?
Acetic acid
Sodium hydroxide
Potassium permanganate
Sulphuric acid
8)
In the preparation of a standard solution of oxalic acid, what is the role of a measuring flask?
It adds the solute to the solution
It measures the volume of the solution
It delivers the titrant
It measures the mass of the solute
9)
Why is it necessary to stir the solution while preparing a standard solution of oxalic acid?
To dissolve the oxalic acid completely
To prevent the loss of oxalic acid
To avoid the formation of by-products
To increase the rate of reaction
10)
What is the purpose of standardizing the oxalic acid solution?
To calculate the concentration of the unknown solution
To check the accuracy of the equipment used
To balance the redox equation
To determine the purity of the oxalic acid