Table of Contents

## What will be the molarity of 20 NaOH solution?

Calculate the molarity of the solution. 20 gr of NaOH correspond to 0.5 moles which are contained in 0.5 liter of solution. In one liter of solution there will be (2)(0.5) = 1 mole and thus the solution is 1 M.

**How do you make a 20 NaOH solution?**

20\% NaOH (W/V), means 20 grams of NaOH solids, dissolved in distilled water until you have 100mL of aqueous solution. Do this in beaker slowly, and drip water until it reaches exactly 100 mL mark. 20\% NaOH(W/W) means 20 grams of NaOH solids plus 80 grams of distilled water, making up 100 grams of solution.

### How do you calculate molarity from WW?

- Use the density of the solution to get the total volume of the solution.
- Then use the weight percent of solute to determine the amount of substance of the solute.
- Use the amount of substance of the solute divided by the volume to get molarity.

**What is water molarity?**

So the Molarity of pure water is 55.55 M.

## What is the molarity of a 20\% solution?

The best I can explain: Given, 20\% (w/v) means 20 g of H2SO4 is present in 100 mL (= 0.1L) of solution. M = 0.204 moles/0.1 L = 0.204 M.

**What is the molarity of a 20\% NaOH solution?**

A 20\% weight by volume, or (w/v), solution of NaOH is 20g of NaOH per 100 ml. The definition of molarity is moles per litre, so we need to work out how many moles we have in 1 litre, and for this, we need the molecular weight of NaOH, which is 39.997 g/mol.

### How many grams of NaOH are in a 100ml solution?

A 20\% weight by volume, or (w/v), solution of NaOH is 20g of NaOH per 100 ml. The definition of molarity is moles per litre, so we need to work out how many moles we have in 1 litre, and for this, we need the molecular weight of NaOH, which is 39.997 g/mol. So, in 100 ml we have 20 g of NaOH.

**What is the mass of a solution with 20\% of water?**

\%w/w = Mass of solute Mass of solution ×100 20\%w/w means 20 g of sulfuric acid is present in 100 g of water Density of water = 1 g/mL Volume of water in given solution = 100 g 1 g/mL = 100 mL = 0.1 L

## What is the molar mass of 20g of H2SO4?

Molar mass of H2SO4 = 98 g/mol Moles of H2SO4 in given solution = 20 g 98 g/mol = 10 49mol Molarity = Moles of solute Volume of solution (in litres) Molarity = 10 49mol 0.1 L = 2.04 mol/L