Which of the following statements is correct?a)Molar conductivity of a...
Molar conductivity increases with decrease in concentration as the total volume, , of solution containing one mole of electrolyte also increases. Upon dilution the concentration decreases. Variation of molar conductivity with concentration is different for strong and weak electrolytes.
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Which of the following statements is correct?a)Molar conductivity of a...
Explanation:
When an electrolyte is dissolved in water, it dissociates into ions. The molar conductivity of an electrolyte is a measure of its ability to conduct electricity in solution. It depends on the concentration of the electrolyte and the mobility of the ions.
Molar conductivity and dilution:
1. Strong electrolyte:
- A strong electrolyte completely dissociates into ions when dissolved in water.
- As the electrolyte is diluted, the concentration of ions decreases.
- However, the mobility of ions remains constant.
- Therefore, the molar conductivity of a strong electrolyte increases with dilution.
- This is because the decrease in concentration is more than compensated by the constant mobility of ions.
2. Weak electrolyte:
- A weak electrolyte partially dissociates into ions when dissolved in water.
- As the electrolyte is diluted, the concentration of ions decreases.
- However, the mobility of ions remains constant.
- Therefore, the molar conductivity of a weak electrolyte decreases with dilution.
- This is because the decrease in concentration is not compensated by the constant mobility of ions.
Answer:
Based on the above explanations, the correct statement is option 'd' - the molar conductivity of a strong and weak electrolyte increases with dilution.
Which of the following statements is correct?a)Molar conductivity of a...
On dilution volume of solution increases.In case weak electrolyte, dilution leads to better dissociation of electrolyte into ions by Ostwald dilution theory which leads to increase in molar conductivity.