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3 years ago

HELPPP What method should you use to separate this sample of mixture?

Chemistry

1 answer:

kozerog [31]3 years ago

8 0

Answer:

The answer to your question is: D. Fractional distillation

Explanation:

A. Column chromatography this method is use to separate mixtures base in its capacity to be absorbed.

B. Fractional crystallization this method use the solubility of solutes in a solvent.

C. Simple distillation is a method to separate 2 liquids based on the difference in their boiling points.

D. Fractional distillation is a method used to separate a mixture of liquids which have their boiling points very close.

E. Paper chromatography is a method to separate a mixture based on their different rate of migration on a paper.

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a = Proton transfer d = SN2 Nucleophilic substitution g = Nucleophilic subs at carbonyl(acyl Xfer) b = Lewis acid/base e= Electr

marissa [1.9K]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The solution to this question is shown on the second uploaded image

Explanation:

4 0

3 years ago

People take antacids, such as milk of magnesia, to reduce the discomfort of acid stomach or heartburn. The recommended dose of m

Llana [10]

Answer:

$V_{HCl}=0.208L=208mL$

Explanation:

Hello,

In this case, since the chemical reaction is:

$2HCl+Mg(OH)_2\rightarrow MgCl_2+2H_2O$

We can see that hydrochloric acid and magnesium hydroxide are in a 2:1 mole ratio, which means that the neutralization point, we can write:

$n_{HCl}=2*n_{Mg(OH)_2}$

In such a way, the moles of magnesium hydroxide (molar mass 58.3 g/mol) in 500 mg are:

$n_{Mg(OH)_2}=500mg*\frac{1g}{1000mg}*\frac{1mol}{58.3g} =0.00858mol$

Next, since the pH of hydrochloric acid is 1.25, the concentration of H⁺ as well as the acid (strong acid) is:

$[H^+]=[HCl]=10^{-pH}=10^{-1.25}=0.0562M$

Then, since the concentration and the volume define the moles, we can write:

$[HCl]*V_{HCl}=2*n_{Mg(OH)_2}$

Therefore, the neutralized volume turns out:

$V_{HCl}=\frac{2*0.00858mol}{0.0562\frac{mol}{L} }\\ \\V_{HCl}=0.208L=208mL$

Best regards.

3 0

3 years ago

. How many ethyl groups are in the molecule 3, 3-diethylpentane?

Mamont248 [21]

Answer:

2 groups

Explanation:

The molecule 3, 3-diethylpentane has 2 ethyl groups because the prefix di- means that there are 2 homogeneous substituent groups present in the molecule.

6 0

2 years ago

When air pressure rapidly falls, what weather change usually occurs?

Mama L [17]

hope this helps

Explanation:

a prolong storm will occur

that's what I found

8 0

3 years ago

What is the least informative property of a mineral

Scrat [10]

All of them are important to identify a mineral and get information from it, but I'd say the least important is cleavage.

6 0

3 years ago