4. Using phenolphthalein as indicator, 25 mL of a solution containing a mixture of Na2CO3 and KOH requires 15.5 mL of 0.01 M HCl for the endpoint. Addition of
methyPorange indicator to the solution at the phenolphthalein endpoint requires 8.0
mL of the same HCl for the endpoint detection. Calculate the concentration of KOH
in g/l of solution

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a c d and f

just finished the assignment

it's all four options.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.