Propanone and iodine react in aqueous acidic solution according to the following overall equation:
CH, COCH3 + 12 + H - CH3COCH, I + 2H+ +1
The experimentally determined rate equation for this reaction is
rate = k{CH COCH3][H+]
(a) With initial concentrations as shown, the initial rate of
reaction was 1.43 x 10-6 mol dm-3 s- !
Initial concentration/mol dm-
CH, COCH
0.400
H
0.200
1
4.00 x 10-4
Calculate a value for the rate constant, k, for the reaction 3​

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

Compare and contrast physical changes with chemical changes.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.