Which statement is correct? A. pKa is not an indicator of acid strength. B. An acid with a small Ka is stronger than an acid wit
2 answers:
Answer:
D) An acid with a small pKa is stronger than an acid with a large pKa
Explanation:
Hi, the acity constant (Ka) gives an idea of the strenght of an acid. The higher the Ka, the stronger the acid.
The indicator pKa is obtained by the following formula:
Due to the logarithm, when the Ka increases, the pKa decreases.
<u>Putting all this toghether</u>: An acid with a large Ka has a small pKa and is stronger than an acid with a small Ka (large pKa).
So the correct statement is D
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Answer:
0.119 moles
Explanation:
Given that,
Mass measured by Nurse Antonio is 7 grams of NaCl
To find,
The no of moles of NaCl
Solution,
The number of moles is given by
m is given mass
M is molar mass
For NaCl, molar mass is 23+35.5 = 58.5 grams
So,
Therefore, there are 0.119 moles of NaCl.
Answer: 147 mL
Explanation:
<u>Given:</u>
Molarity of the sodium bromide (NaBr) solution (M1) = 1.75 M
Volume of the solution (V1) = 84 mL
Molarity of the diluted NaBr solution (M2) = 1 M
Using the dilution formula to solve for V2:
Therefore, the new volume of the solution is 147 mL