The pH and electrical conductivity of four different mixtures were measured: Mixtures Conductivity (Ma) PH a) 0.1 mol L-1 HCl 260 1 b) 0.1 mol L-1 CH3OOH 5 3 c) Mixture made by mixing equal valumes of 0.2 mol L-1 HCl and 0.2 mol L-1 NaCl 340 1 d) Mixture made by mixing equal volumes of 0.2 mol L-1 HCl and 0.2 mol L-1 NaCH3COO 80 3 a) Explain why the conductivity of mixture A is higher than that of mixture B, yet the pH of A is lower than the pH of B. Include relevant equations in your answer. b) Explain why the pH of mixture C is the same as the pH of mixture A. c) Why is the conductivity of mixture C larger than the conductivity of mixture A? d) Why is the pH of mixture D the same as the pH of mixture B? Part B – Determine the final pH for the following two solutions a) Solution A after mixing 500mL 0.2M HCl and 300 mL 0.6M HCl b) Solution B after mixing 400mL 0.3M HCl and 200mL 0.8M NaOH
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The pH and electrical conductivity of four different mixtures were measured:
Mixtures | Conductivity (Ma) | PH |
a) 0.1 mol L-1 HCl | 260 | 1 |
b) 0.1 mol L-1 CH3OOH | 5 | 3 |
c) Mixture made by mixing equal valumes of 0.2 mol L-1 HCl and 0.2 mol L-1 NaCl | 340 | 1 |
d) Mixture made by mixing equal volumes of 0.2 mol L-1 HCl and 0.2 mol L-1 NaCH3COO | 80 | 3 |
a) Explain why the conductivity of mixture A is higher than that of mixture B, yet the pH of A is
lower than the pH of B. Include relevant equations in your answer.
b) Explain why the pH of mixture C is the same as the pH of mixture A.
c) Why is the conductivity of mixture C larger than the conductivity of mixture A?
d) Why is the pH of mixture D the same as the pH of mixture B?
Part B –
Determine the final pH for the following two solutions
a) Solution A after mixing 500mL 0.2M HCl and 300 mL 0.6M HCl
b) Solution B after mixing 400mL 0.3M HCl and 200mL 0.8M NaOH
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d) Why is the pH of mixture D the same as the pH of mixture B?
Part B – follow on from the above question?
Determine the final pH for the following two solutions
a) Solution A after mixing 500mL 0.2M HCl and 300 mL 0.6M HCl
b) Solution B after mixing 400mL 0.3M HCl and 200mL 0.8M NaOH