17. An indicator HIn has a \(K_a = 1 \times 10^{-8}\). At pH = 6.0, what is the ratio HIn/In⁻? (A)1/1 (B)100/1 (C)1/100 (D)1/1 (E)none of these

4. To calculate the concentration in molarity of a salt solution, you need to know (A)The mass of the salt added and the volume of water added to the solution. (B)The mass of the salt added to the solution and the total volume of the solution. (C)The mass of the salt added, the molar mass of the salt, the volume of water added to the solution. (D)The molar mass of the salt and the total volume of the solution. (E)The mass of the salt added, the molar mass of the salt, the volume of water added, and the total volume of the solution.

17. An indicator HIn has a \(K_a = 1 \times 10^{-8}\). At pH = 6.0, what is the ratio HIn/In⁻?
(A)1/1
(B)100/1
(C)1/100
(D)1/1
(E)none of these

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