- #1
xec
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Which one has a greater concentration, 1 molar NaOH or 1 molal NaOH aqueous solution?
for the answer Explain Why!
for the answer Explain Why!
Explain Why 1 Molar NaOH is More Concentrated Than 1 Molal NaOH Aqueous Solution
- Thread starter xec
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In summary, the conversation is discussing the comparison of concentration between 1 molar NaOH and 1 molal NaOH aqueous solution. The answer is that it depends on whether the emphasis is on moles or mass of the solute. To determine this, one must calculate the molality of 1M NaOH and the molarity of 1m NaOH, taking into account the solution density for conversion. However, it should be noted that in this case, the same solute (NaOH) is used in both liquids.
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symbolipoint
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The question needs some clarity. Do you need emphasis on moles or on mass of the solute? Once you establish this, next you must make reference based on comparable concentration units.
- #3
Borek
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Calculate molality of 1M NaOH and molarity of 1m NaOH, everything should be clear then.
Note that you will need solution density for conversion. This has to be taken from density tables.
Symbolipoint is right in general, but wrong in this particular case
Besides, looks to me like in practice it always works the same.
Note that you will need solution density for conversion. This has to be taken from density tables.
Symbolipoint is right in general, but wrong in this particular case
Besides, looks to me like in practice it always works the same.- #4
symbolipoint
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I forgot to account properly for the fact that the same solute (NaOH) is used in both liquids.
Borek commented:
Borek commented:
1. What is the difference between molarity and molality?
Molarity (M) is a measure of the concentration of a solution in terms of the number of moles of solute per liter of solution. Molality (m) is a measure of the concentration of a solution in terms of the number of moles of solute per kilogram of solvent. This means that molarity takes into account the volume of the solution, while molality takes into account the mass of the solvent.
2. Why is 1 molar NaOH more concentrated than 1 molal NaOH?
This is because molarity is a measure of concentration in terms of the total volume of the solution, while molality is a measure of concentration in terms of the mass of the solvent. Since the volume of a solution can change with temperature and pressure, molarity can vary. However, the mass of the solvent remains constant, making molality a more accurate measure of concentration.
3. How do you calculate molarity and molality?
To calculate molarity, divide the number of moles of solute by the volume of the solution in liters. To calculate molality, divide the number of moles of solute by the mass of the solvent in kilograms.
4. Does the concentration of a solution affect its properties?
Yes, the concentration of a solution can affect its properties such as density, boiling point, and freezing point. This is because the concentration of a solution affects the number of particles present, which can impact the physical and chemical properties of the solution.
5. How is the concentration of a solution typically expressed?
The concentration of a solution is typically expressed in units of molarity (M) or molality (m). Other common units include percent by mass, percent by volume, and parts per million (ppm).
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