What color is phenolphthalein in basic solution? _____ 0.1 moles of aluminum hyd

Question

What color is phenolphthalein in basic solution? _____ 0.1 moles of aluminum hydroxide, AI(OH)_3, will neutralize _____ moles of H^+. How many moles of H^+ will 1 g of CaCO_3 neutralize? As the rate of a reaction decreases, the time for a given number of moles of a reactant to be consumed (increases, decreases, stays the same) You are to measure the time required for a quantity of IO_3^- to react (with SO_3^-2) using the iodine clock. At what point in the process do you start timing the reaction?

Explanation / Answer

(a) Pink color

(b) 0.3 moles, because 1 mole Al(OH)3 contains 3 moles OH-

(c) 0 , because CaCO3 is a salt not a base

(d) increases

(e) When the solution first turns dark blue, the time recording is started

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