Chemistry, 27.10.2019 19:43 myg21

Based on the definition of logarithms, what is the difference in hydrogen ion concentration between a substance with a ph of 2 and a substance with a ph of 3?
a substance with a ph of 2 has a 10 times higher concentration of h+ than a substance with a ph of 3.
a substance with a ph of 3 has a 10 times higher concentration of h+ than a substance with a ph of 2.
a substance with a ph of 2 has a 100 times higher concentration of h+ ions than a substance with a ph of 3.
a substance with a ph of 3 has a 100 times higher concentration of h+ ions than a substance with a ph of 2.

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The pH scale is a negative logarithmic scale, which means that it changes by factors of 10. Negative exponents are converted into fractions, so something with a pH of 1 has an H+ concentration of 10^-1. or 1/10, or 0.1. A pH of 2 represents 10^-2, 1/100, or 0.01.
Therefore, a solution with a pH of 2 is 10 times more concentrated, in terms of H+, than a solution with a pH of 3.
The first option.

Answer from: Quest

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form( $n_2$ ) .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

Answer from: Quest

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation:

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