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How many grams of NaCl would you dissolve in water to make 50mM NaCl with 500mL?
Wiki User
∙ 9y ago
The molar mass of sodium chloride is 58.5 g/mole. Thus You would have to dissolve 25 * 58.5 g/l to obtain a 25 M NaCl-solution.
The 1462,5 g/l are far beyond the solubility limit of 360 g/l for sodium chloride in water which means that under standard conditions such a solution is not possible. After saturating the solution with 360 g/l of NaCl there would still be 1102,5 g/l of crystalline NaCl left.
Wiki User
∙ 14y ago
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How many grams of naoh are needed to prepare 500ml of 125M naoh?
I think you may have missed a decimal point somewhere. 125M of NaOH would be a solution of sodium hydroxide containing 125 moles per litre. One mole of a compound is the same number of grams as the molecular weight of the molecule. Sodium hydroxide has a molecular weight of 40 ( sodium 23, oxygen 16, and hydrogen 1), so a one molar solution would have forty grams of NaOH per litre. 500ml of a 1M solution would contain 20g. 500ml of a 125M solution would need 2 500g. 1L of a 125M solution would need 5 000g of sodium hydroxide in the litre. The maximum solubility for NaOH in water at 20 degrees is 1110g per litre, so if you tried to dissolve 5 000g in a litre you would be left with 3 890g undissolved. A 1.25M solution would have 1.25 times 40g per litre, which is 50g per litre. 500ml of this solution would have half this amount of NaOH, or 25g.
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Whether all of the sugar dissolved or not, and it would be very unlikely that it would all dissolve in that small an amount of water, the total mass of the solution or mixture would be 250 grams.
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How many grams of calcium chloride would you add to water for a totoal volume of 500 ml to make a 5 percent solution?
Take 5 grams of calcium chloride and dissolve it in 100ml of solution to get a 5% solution of calcium chloride. The standard way to make a weight-volume solution is to take grams of the dry substance in 100ml of volume.
How many grams of nacl would you dissolve in water to make a 50mM nacl solution with a 500mL of final volume?
Solubility increases with temperature, but the solubility of sodium chloride in water is 316 grams per litre at 0 degrees Celsius, and 330 grams per litre at 70 degrees Celsius. Since room temperature is somewhere between these two, this gives upper and lower limits of the solubility at room temperature. 50 grams of water has a volume of 50 cubic centimetres, or 0.05 litres. In one litre you could dissolve between 316 grams and 330 grams, so in 0.05 litres you could dissolve between 15.8 and 16.5 grams, where 15.8 = 316 x 0.05 and 16.5 = 330 x 0.05. So we can say it's around 16 grams of NaCl in 50 grams of water at room temperature.
Preparation of 1M KOH solution?
Depends on how accurate you need to be. Ideally 56.11g of KOH made up to 1L. Dissolve 56.11g in say 500ml then make up to 1l using water - 1l volumetric is the way to go. If you need 1000L then I would suggest 56.11kg chucked into 1000L All the best
