1. Weigh 80 g NaOH.
2. Put this NaOH in a 1 L volumetric flask.
3. Add slowly 200 mL distilled water and stir.
4. Put the flask in a thermostat at 20 0C and maintain for 1 hour.
5. Add distilled water up to the mark. Stir vigorously.
6. Standardize the solution by titration with oxalic acid, potassium hydrogen phtalate, etc.
7. Transfer the solution in a bottle and apply a label (date, name of the operator, name of the solution, normality).
Accurate caustic soda solution is rarely made-up because in a lab it would require use of volumetric flasks, and they are not used for caustic soda. Weigh required amount of NaOH pellets (40g per litre), add to half the final volume of water and dissolve. Top-up to the required volume. Titrate against a convenient standard, usually a strong acid, usually sulphuric, correct concentration of the NaOH as required (unless you have been sloppy, it will not be too concentrated).
1. Weigh 4 g NaOH.
2. Put this NaOH in a 1 L volumetric flask.
3. Add slowly 100 mL distilled water and stir.
4. Put the flask in a thermostat at 20 0C and maintain for 1 hour.
5. Add distilled water up to the mark. Stir vigorously.
6. Standardize the solution by titration with oxalic acid, potassium hydrogen phtalate, etc.
7. Transfer the solution in a bottle and apply a label (date, name of the operator, name of the solution, normality).
1. Weigh 8 g NaOH.
2. Put this NaOH in a 1 L volumetric flask.
3. Add slowly 100 mL distilled water and stir.
4. Put the flask in a thermostat at 20 0C and maintain for 1 hour.
5. Add distilled water up to the mark. Stir vigorously.
6. Standardize the solution by titration with oxalic acid, potassium hydrogen phtalate, etc.
7. Transfer the solution in a bottle and apply a label (date, name of the operator, name of the solution, normality).
1. Weigh 4 g NaOH.
2. Put this NaOH in a 1 L volumetric flask.
3. Add slowly 100 mL distilled water and stir.
4. Put the flask in a thermostat at 20 0C and maintain for 1 hour.
5. Add distilled water up to the mark. Stir vigorously.
6. Standardize the solution by titration with oxalic acid, potassium hydrogen phtalate, etc.
7. Transfer the solution in a bottle and apply a label (date, name of the operator, name of the solution, normality).
0.4 g of NaoH in 100 mL std flask and make up with distilled water.
4 g NaOH is dissolved with water to make a 1 liter solution, or any proportional amounts of each. -- half of each, 2 g NaOH and dissolve to make 500 ml solution.
Take 10 ml of 1 N NaOH and dilute to 1000 ml with D.I. H2O
The dilution ratio is 1/10 (1 part 0,1 N solution mixed with 9 parts water).
mehedi hasan
In order to make 0.02 N NaOH from 0.2 N NaOH, one needs to dilute it by 10 x (10 fold). Depending on the volume of 0.02 N NaOH needed, that will determine the volume of 0.2 N used. For example, to make 100 ml of 0.02 N NaOH, you would dilute 10 mls of 0.2 N to 100 ml. This is seen in the following calculation: (x ml)(0.2 N NaOH) = (100 ml) (0.02 N NaOH) and x = 10 ml
It is same, instead of water take methanol...
Take 10 ml of 1 N NaOH and dilute to 1000 ml with D.I. H2O
The dilution ratio is 1/10 (1 part 0,1 N solution mixed with 9 parts water).
mehedi hasan
In order to make 0.02 N NaOH from 0.2 N NaOH, one needs to dilute it by 10 x (10 fold). Depending on the volume of 0.02 N NaOH needed, that will determine the volume of 0.2 N used. For example, to make 100 ml of 0.02 N NaOH, you would dilute 10 mls of 0.2 N to 100 ml. This is seen in the following calculation: (x ml)(0.2 N NaOH) = (100 ml) (0.02 N NaOH) and x = 10 ml
It is same, instead of water take methanol...
0.5 N
Take 60 gm NaOH (100%) disolve it in distilled water, and make up to 2.0 liter by distlilled water.the prepared solution is 0.75 N NaoH Solution.
Since "normality" is defined as the gram equivalent weight of a substance in a liter of solution, a 0.02 N NaOH solution would have 0.02 gram equivalents of NaOH per liter. To reduce it to 0.01 N you need only dilute it to one half of the original - e.g. 500 ml of NaOH mixed with 500 ml of pure water. Because there is a small change in the density upon mixing, the exact amount of water will differ slightly from 500 ml, but for a solution as dilute as 0.02 N, it won't be that far off. The best way to get it exact would be to start with a known volume of 0.02 N NaOH and then add enough water to bring the total to exactly twice the original volume. This might be accomplished by doing it in a graduated cylinder or adding it from a burette into a volumetric flask. the important thing is to know the starting volume of the 0.02 N solution and the final volume of the diluted (0.01 N) solution
NaOH and H2O form a solution of Na+(aq) and OH-(aq) ions (the solvent water, aq, is written as subscripted (aq) ) To make 1 Normal solution you need to know the equivalent of NaOH, which is calculated by dividing Molecular weight by 1, that is 40 divided by 1= 40. So the equivalent weight of NaOH is 40. To make 1 N solution, dissolve 40.00 g of sodium hydroxide in water to make volume of 1 liter.
Dissolve 0.4 g of NaOH in 100 ml of water. Try it out. Actually it is not suitable to prepare NaOH solutions in standard flasks.It should be made in beakers & must be standardised..This is done to find the correct normality...
1 millimolar = 0.001 M NaOH ( a base, remember ) - log(0.001 M NaOH) = 3 14 - 3 = 11 pH ----------
add 10 grams of NaoH into 1000 ml water, it will give you NaoH of 0.25N. As for making 1N solution you need to disolve 40 grams of NaoH into 1 litre water.