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Sladkaya [172]
3 years ago
9

How does a buffer work?

Chemistry
2 answers:
Tcecarenko [31]3 years ago
8 0

Answer: O D. It bonds with the added H+ or OH in solution.

Explanation:

Liula [17]3 years ago
5 0

It bonds with the added H+ or OH- in solution.

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A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a
torisob [31]

Answer:

C) k_a=1.3\times 10^{-5}

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

pH=-log(\sqrt{k_a\times C})

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M

C = 0.100 M

2.94=-log(\sqrt{k_a\times 0.100})

\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94

\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}

k_a=1.3\times 10^{-5}

4 0
3 years ago
What is an endothermic reaction?
GrogVix [38]
C is the right answer as endothermic reaction takes in the heat. That is why cooling effect is observed whenever such reaction takes place.
Hope this helped :)
3 0
3 years ago
How are radioisotopes used to study chemical reactions?
Natalka [10]
Radioisotopes are used to study chemical reactions because of the fact that they attach radioactive isotopes to certain atoms.<span>  Tracer radioisotopes used to study chemical reactions in molecular structures by adding radioistopes to reactants and using the uptake compared to the original isotope. </span>
8 0
3 years ago
Use the reaction to answer the question.
Vadim26 [7]

Answer:

–698 kJ/mol

Explanation:

i guessed and got it right

8 0
3 years ago
Read 2 more answers
Who was the first scientist to measure speed as distance over time?
777dan777 [17]

Galileo was the first scientist to measure speed as distance over time.

8 0
3 years ago
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