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## What mass of NaOH is required to react exactly with 25.0 ml of 2.0 M H2SO4?

As sulphuric acid is a dibasic acid,so 2 NaOH molecules are require to neutralise 1 sulphuric acid molecule. Hence,Moles of NaOH require = 0.075 mol*2 = 0.15 mol. Mass of NaOH = mole*molar mass = 0.15mol*40g/mol = 6g. So,6 g of NaOH is required to react exactly with 25.0 ml of 3.0 M H2SO4.

0.525 g

## What is the mass of 2 mole of NaOH?

The molar mass of the compound NaOH is 40 g/mol.

## How do you make a 0.1 molar solution?

If you dissolve 58.44g of NaCl in a final volume of 1 litre, you have made a 1M NaCl solution. To make a 0.1M NaCl solution, you could weigh 5.844g of NaCl and dissolve it in 1 litre of water; OR 0.5844g of NaCl in 100mL of water (see animation below); OR make a 1:10 dilution of a 1M sample.

## How would you prepare 100 ml of a 0.1 M solution?

For example, to make 100 ml of 0.1 M CaCl2 solution, use the previous formula to find out how much CaCl2 you need: grams of CaCl2 = (0.1) x (110.91) x (100) ÷ (1000) = 1.11 g.

## Why Oxalic acid is a weak acid?

Oxalic acid is a weak acid and will only partially ionize in an aqueous solution. There are two acidic protons in oxalic acid. The first ionization produces HC2O4-, which is also a weak acid and will also ionize. Good!

## How would you prepare 250ml M 20 oxalic acid?

Its Molecular Wt. 126. Hence, to prepare 250 ml M/20 oxalic acid solution 126*250/(20*1000) = 1.575 gram of oxalic acid is to be dissolved in water in a 250 ml volumetric flask.

## How do you make an M 20 solution of oxalic acid?

Weigh exactly 1.58 g of oxalic acid crystals and dissolve in water to prepare 500 ml of its solution using a 500 ml measuring flask. Rinse the pipette with the N/20 oxalic acid solution and pipette out 20 ml of it in a washed titration flask.

C2H2O4

## How do you make 1 normal oxalic acid?

mole of oxalic acid means molecular weight gram of acid(90 g = 1 mol ). If you dissolve 90 g of acid in 1 liter of water then it will be 1 normal (N). To make 0.1 N you need to dissolve 9 g ofoxalic acid in 1 liter. If you want to make 1 Molar acid you should dissolve 90 g of acid in 1 kg of water.

## Why is oxalic acid dihydrate a good primary standard?

This strong H-bonding make it so stable that two water molecule won’t loose in ambient conditions. That’s a good reason to use it as a primary standard.

## Is sulfuric acid a primary standard?

Some examples of primary standards for titration of solutions, based on their high purity, are provided: Sodium carbonate for standardisation of aqueous acids: hydrochloric, sulfuric acid and nitric acid solutions (but not acetic acid)

2021-06-17