How much mass does 40 NaOH need?

Answer: The Answer is 8 grams of NaOH.

How many grams of NaOH 40 g mol are there in 250 mL of 0.4 M NaOH solution?

2 Answers. Approx. 4 g of NaOH.

What is the mass of NaOH that is required to make 500ml of a 0.5 M aqueous solution?

Since, molarity = number of moles of solute/ volume of solution in lit. Hence, 10g of NaOH should be taken to obtain a 0.5 M solution of volume 500 mL.

How can we prepare 0.5 M 400 mL NaOH solution?

So, if you add 0.024gm of NaOH in 1 Litre of water you will get the required solution.

What is the molarity of 40\% NaOH?

0.5 molar
A solution of NaOH (mw = 40) is prepared by dissolving 20 grams of the base in enough water to make one liter of solution. Calculate the molarity of this solution. Since molarity is the number of moles in 1 liter of solution, the solution is 0.5 molar.

What mass of NaOH is present in 0.5 mole of sodium hydroxide?

However, in expressing the concentration as M (molarity) the volume of the solution is also taken into account. Thus, 0.5 mole of NaOH represents simply 20 g of the base while 0.5 M means 20 g of the base or NaOH dissolved per litre of the solution.

What mass of NaOH is in 250 ml of a 3.0 m NaOH solution?

29.99 g
Explanation: It’s a 3.0 M solution so 1 litre of solution contains 3 moles of NaOH. 250 ml of solution therefore contains 0.25 x 3 = 0.75 moles of NaOH. The molar mass of NaOH is 39.9971 g/mol, so 250 ml of this solution contains 0.75 x 39.9971 = 29.99 g, or if you round it up 30.0 g.

How many grams of NaOH should be added to 250 ml?

The number of grams of NaOH to be added to water to prepare 250ml solution of 2M NaOH is 20 grams. Explanation: Molarity is defined as the ratio of the amount of solute to the solution or the amount of moles dissolved the amount of solvent in the total moles of total solution.

How do you make a 50\% NaOH solution?

Stock solution, 50\% (by weight): Add 100 mL of distilled water to 100 g of reagent grade sodium hydroxide (NaOH) pellets and stir until solution is complete.

What is the mass of 40g of NaOH in grams?

Mass of NaOH = 40 g/mol * 0.5 mol = 20.0 g NaOH required. The molar mass of NaOH is 40 grams. How many grams of NaOH will be required to prepare 1 liter 0.01 M NaOH in 1,000 cm3 solution?

How can I prepare a 250ml solution of NaOH?

That is to prepare 250 ml NaOH solution dissolve 10 g NaOH crystals in 250 ml volumetric flask and dilute up to the mark with the distilled water you get approx 1M NaOH solution. NaOH is a secondary slandered,it can absorb moisture from air .so we can’t prepare it’s standard solution by direct weighing of NaOH.

How do you find the molar mass of NaOH in moles?

Rearrange the equation to solve for moles of solute: Multiply 0.450 M by 0.200: To obtain the mass of solute, we will need to the molar mass of NaOH, which is 40.00 g/mol: Finally, multiply the number of moles by 40.00 g/mol

How to prepare moldm-3 NaOH solution from dissolved NaOH?

Tranfer the dissolved NaOH in the 500 cm3 deionised and transfer via a funnel into a 1000 cm3 (1 litre) and dilute to the mark with deionised water. This will produce a 0.5 moldm-3 NaOH solution. You do not produce a 0.5 M solution of NaOH ( or any other solute) by dissolving a calculated mass in 1.0 L of water