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vredina [299]
3 years ago
11

A student accidentally reversed the order of solvents A, B, and C in the column chromatography and used the acetone FIRST and th

en the remaining solvents. Predict what will happen to the student’s ability to separate compounds. Explain your reasoning
Chemistry
1 answer:
Neporo4naja [7]3 years ago
5 0

Answer:

It will be difficult

Explanation:

He should have started from a non-polar solvent, which will dissolve the non-polar compound and elute it first before using the polar solvent, acetone can dissolve both polar and non-polar compound, making a hitch in d separation

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Twenty-seven milliliters of an acid with an unknown concentration are titrated with a base that has a concentration of 0.55 M. T
Svetllana [295]
It should be 0.25 M. Use the formula C1*V1=C2*V2, for those values, as it is right when it changed colour. Remember to change the if those are not the same (but in your case it is, so no need this time). 

C1*V1=C2*V2
C1*27ml=0.55M*12.5ml
C1=(0.55M*12.5ml)/27ml = 0.25M
4 0
3 years ago
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Which element is likely to gain one electron when it combines chemically with another element? a potassium b krypton c gold d ch
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Chlorine because it lacks one valence electron to fill it's outer shell
7 0
3 years ago
The pka of hf is 3.2 determine the pkb of hf?
Julli [10]

Well, first we must remember that

pK_{a}+pK_{b}=14

This is because

K_{a}*K_{b}=10^{-14}

-log(K_{a}*K_{b})=-log(10^{-14})\\-logK_{a}+-logK_{b}=-log(10^{-14})\\pK_{a}+pK_{b}=14

So then

pK_{b}=14-pK_{a}=14-3.2=1.8

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Answer: B. It increases quickly

Explanation:

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A wood pole is 12 metres long and is cut into 5 equal sections. If each cut wastes 10 cm of pole, what length would each section
Sophie [7]

Each section would be 230 centimeters or 2.30 meters long.

<h3>Sectional division</h3>

The original wood pole is 12 meters long.

12 meters = 12 x 100 = 1200 centimeters

It is to be cut into 5 equal sections: 1200/5 = 240 centimeters

But each cut wastes 10 cm of the pole.

          240 - 10 = 230 centimeters.

Thus, each section would be 230 centimeters or 2.30 meters long.

More on sectional divisions can be found here: brainly.com/question/15381501

#SPJ1

6 0
1 year ago
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