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Okay the question goes Phenolphthalein indicator turns pink in the presence of OH- ions. Consider a simple galvanic cell in which the two electrodes are zinc and iron, immersed into a saltwater electrolyte containing phenolphthalein... a) at which electrode will the electrolyte turn pink? (i...

Hey just want to ask, i came across with this question asking if the concentration of one of the ion in the oxidation half-cell increases, would the voltage increase or decrease... The answer it decreases... Can anyone explain to me why??? Thanks =]

\alpha is a root of x^{4}+2x^{3}+ax^{2}+2x+1=0 and a does not equal to 2,-6 i showed the first question and second question that i) \alpha\neq 0, \pm 1 ii) x=\frac{1}{\alpha} but im up to the third part of the question that asks me to deduce if \alpha is a multiple root, then its multiplicity...