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Elodia [21]
3 years ago
14

Which segment represents melting?" Temperature (°C) Time (minutes)

Chemistry
1 answer:
zheka24 [161]3 years ago
4 0
The segment that represents melting is time (minutes) and temperature.
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In your discussion consider a SN2 reaction mechanism concept. Propose a modification of experimental procedure that would improv
Hitman42 [59]

Answer:

Here's what I get  

Explanation:

You may have done a Williamson synthesis of guaifenesin by reacting guaiacol with 3-chloropropane-1,2-diol.

A. Mechanism

Step 1

NaOH converts guaiacol into a phenoxide ion.

Step 2

The phenoxide acts as the nucleophile in an SN2 reaction to displace the Cl from the alkyl halide.

B. Improve the yield

You probably carried out the reaction in ethanol solution — a polar protic solvent.

You might try doing the reaction in a polar aprotic solvent— perhaps DMSO.

A polar aprotic solvent does not hydrogen bond to nucleophiles, so they become stronger.

C. Another method of ether synthesis —dehydration of alcohols

Sulfuric acid catalyzes the conversion of primary alcohols to ethers.

This is also a nucleophilic displacement reaction.

Protonation of the OH converts it into a better leaving group.

Attack by a second molecule of alcohol forms the protonated ether.

A molecule of water then removes the proton.

6 0
3 years ago
Which reaction below represents a balanced, double replacement chemical reaction?
Mariulka [41]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

I think the reaction that represents a balanced, double replacement chemical reaction is B which is <span>Rb2O + Cu(C2H3O2)2 → 2RbC2H3O2 + CuO </span>
4 0
3 years ago
How many moles of copper would be needed<br> to make 1 mole of Cu,O?
azamat

Answer:

You can view more details on each measurement unit: molecular weight of Copper(I) Oxide or grams The molecular formula for Copper(I) Oxide is Cu2O. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Copper(I) Oxide, or 143.0914 grams.

Explanation:

4 0
3 years ago
In a solution of salt and water which compound is the solute?
ra1l [238]
Solute is what gets dissovled, in this case the salt, and the solVENT is whatever a material is dissolved into, in this case the water.
7 0
3 years ago
When placed in a freezer , liquid water turns into ice . What best describes this change ?
GREYUIT [131]

Answer:

Freezing

Explanation:

liquid changing to a solid = Freezing

4 0
3 years ago
Read 2 more answers
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