- #1
Corky
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What volume of 50% NaOH (by weight) solution is necessary to prepare 1 litre of 0.1M NaOH? Assume that the density of the NaOH solution is 1.53g/ml.
To calculate the amount of 0.1M NaOH needed for 1L of 50% NaOH solution, you will need to use the formula C1V1 = C2V2. In this case, C1 is the concentration of the 0.1M NaOH solution, which is 0.1 mol/L. V1 is the volume of the 0.1M NaOH solution you want to make, which is 1L. C2 is the concentration of the 50% NaOH solution, which is 50 g/L, and V2 is the volume of the 50% NaOH solution you want to make, which is also 1L. Plugging these values into the formula, you will get V1 = (C2V2)/C1, which is (50 g/L x 1L)/(0.1 mol/L) = 500 mL. Therefore, you will need 500 mL of the 0.1M NaOH solution to make 1L of 50% NaOH solution.
Molarity (M) is a measure of the number of moles of a solute dissolved in 1 liter of a solution, while percentage concentration is a measure of the amount of solute present in a given volume of solution. Molarity is expressed in units of mol/L, while percentage concentration can be expressed in various units such as % (w/w), % (w/v), or % (v/v). Additionally, molarity takes into account the volume of the solution, while percentage concentration does not.
To make a 50% NaOH solution from a 0.1M NaOH solution, you will need to use the formula C1V1 = C2V2. In this case, C1 is the concentration of the 0.1M NaOH solution, which is 0.1 mol/L. V1 is the volume of the 0.1M NaOH solution you want to use, which can be any desired volume. C2 is the concentration of the 50% NaOH solution, which is 50 g/L, and V2 is the volume of the 50% NaOH solution you want to make. Plugging these values into the formula, you will get V2 = (C1V1)/C2, which is (0.1 mol/L x V1)/(50 g/L) = 0.002L or 2 mL. Therefore, you will need 2 mL of the 0.1M NaOH solution to make 1L of 50% NaOH solution.
No, you cannot use any volume of 0.1M NaOH to make 1L of 50% NaOH solution. The volume of 0.1M NaOH needed will depend on the concentration of the 50% NaOH solution you want to make. For example, if you want to make 2L of 50% NaOH solution, you will need to use 4 mL of the 0.1M NaOH solution, as calculated in the previous question. It is important to use the correct volume of 0.1M NaOH to ensure the desired concentration of the final solution.
The purpose of using 0.1M NaOH in the preparation of 50% NaOH solution is to accurately and precisely determine the amount of NaOH needed to make the desired concentration of the final solution. 0.1M NaOH is a standard solution with a known concentration, making it easier to calculate the amount needed for the desired concentration of the 50% NaOH solution. This also helps to ensure the consistency of the final solution for experimental purposes.