Enter part(a), (c) with 2 siginificant digits and part(b) with 3 siginificant digits.

Question

Enter scientific notation as 1.23E4.



(a) What is Ecell if the unknown solution in the half-cell on the left has pH = 4.94?



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(b) What is Ecell if the unknown solution in the half-cell on the left is 0.03890 M HCl?



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(c) What is Ecell if the unknown solution in the half-cell on the left is 0.194 M HA, where HA represents a weak acid with Ka = 1.8x10−5?



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