Chemistry, 06.08.2019 06:10 vlactawhalm29

You have 185 ml of an acid with an unknown concentration. to determine the concentration you decide to use a 0.85 m solution of sodium hydroxide to titrate the acid. after the titration you determined that it took 35.7 ml of the 0.85 m solution of sodium hydroxid to reach the endpoint. what is the acids concentration?

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Answer from: passions3534ovf6dt

Explanation:

The given data is as follows.

$M_{1}$ = ?, $M_{2}$ = 0.85 M

$V_{1}$ = 185 mL, $V_{2}$ = 35.7 mL

where, $M_{1}$ is concentration of acid

$V_{1}$ is the volume of acid

$M_{2}$ is the concentration of base

$V_{2}$ is the volume of base

According to the neutralization formula.

$M_{1} \times V_{1}$ = $M_{2} \times V_{2}$

Now, substituting the given values into the above formula as follows.

$M_{1} \times V_{1}$ = $M_{2} \times V_{2}$

$M_{1} \times 185 mL$ = $0.85 M \times 35.7 mL$

$M_{1}$ = 0.164 M

Thus, we can conclude that concentration of acid is 0.164 M.

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: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them

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