Oxalic acid (a diprotic acid MW = 108 g/mole) is sometimes used instead of KHP for the standardization of NaOH. If a 0.145 g sample of oxalic acid is titrated to a phenolphthalein endpoint with 23.75 ml of the NaOH solution, what is the molar concentration of the base?
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Dear Sarah,
In chemistry, the molar concentration, ci is defined as the amount of a constituent ni divided by the volume of the mixture V:
ci=ni/V
It is also called molarity, amount-of-substance concentration, amount concentration, substance concentration, or simply concentration. The volume V in the definition ci = ni / V refers to the volume of the solution, not the volume of the solvent. One litre of a solution usually contains either slightly more or slightly less than 1 litre of solvent because the process of dissolution causes volume of liquid to increase or decrease.
Contents in link
1 Units
2 Related Quantities
2.1 Number concentration
2.2 Mass concentration
2.3 Mole fraction
2.4 Mass fraction
2.5 Molality
3 Properties
3.1 Dependence on volume
4 Examples
5 References
6 External links
In chemistry, the molar concentration, ci is defined as the amount of a constituent ni divided by the volume of the mixture V:
ci=ni/V
It is also called molarity, amount-of-substance concentration, amount concentration, substance concentration, or simply concentration. The volume V in the definition ci = ni / V refers to the volume of the solution, not the volume of the solvent. One litre of a solution usually contains either slightly more or slightly less than 1 litre of solvent because the process of dissolution causes volume of liquid to increase or decrease.
Contents in link
1 Units
2 Related Quantities
2.1 Number concentration
2.2 Mass concentration
2.3 Mole fraction
2.4 Mass fraction
2.5 Molality
3 Properties
3.1 Dependence on volume
4 Examples
5 References
6 External links