Question 1 Not changed since last attempt Marked out of 2.00 A solution made up

Question

Question 1 Not changed since last attempt Marked out of 2.00 A solution made up of A and B with X4 = 0.695 is placed in a container. Given a value of 1.6, find the activity of substance A assuming the solution is regular. Flag question Answer Question 2 Not changed since last attempt Marked out of 4.00 P Flag question Find the grams of KNO3 needed to add to a 0.08 mol kg solution of KNO3(aq) containing 3.03 kg of water to raise its ionic strength to 0.21. Answer Question 3 Not changed since last attempt Find the mean ionic activity coefficient for NaCl in a solution at 25°C that has 0.081 mol kg1 of NaClag) and 0.156 mol kg1 in Ca(NO3)2(aq) Marked out of 4.00

Explanation / Answer

Ans 1 :

Since the mole fraction of substance A is given as 0.695 , and the solution is regular.

So the activity of substance A will be given as :

= 0.695 x 1.6

= 1.112

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