A substance that is made up of two or more different types of atoms bonded together is a

Almost. treating an acyl chloride with a grignard reagent tends to form (via two steps) an alcohol. what reagent forms the keton

PIT_PIT [208]

Reaction of Acyl Halides with Grignard reagent results in the formation of Ketones in first step. While in second step reaction of Grignard reagent with Ketones results in the formation of Tertiary Alcohols.

If you want to stop the reaction at Ketone stage then you are required to use another mild reactive organometallic compound. In our case we will use Organocuprates. Organocuprates are also known as Gilman Reagents. These reagents does not add to ketones, aldehydes and esters but they can add to acid halides to produce Ketones.

8 0

3 years ago

All magnetic minerals will have the element iron in the chemical composition true or false

Margaret [11]

The statement is true. If a mineral lacks the presence of iron in it then it will be generally dimagnetic. It means non iron minerals do not show magnetic property in general. There are some minerals like serpentine do show some magnetic susceptibility, however this is negligible as compared to iron minerals hence the ores with no magnetic are generally diamagnetic.

7 0

3 years ago

What were the first 5 planets that were observed? Why were those the only ones? Help pls!

pogonyaev

Mercury Venus mars Jupiter Saturn

4 0

3 years ago

Phosphoric acid is a polyprotic acid, with p K values of 2.14, 6.86, and 12.38. Which ionic form predominates at pH 9.3

Vlad1618 [11]

Answer:

HPO₄⁻² predominates at pH 9.3

Explanation:

These are the equilibriums of the phosphoric acid, a tryprotic acid where 3 protons (H⁺) are realesed.

H₃PO₄ + H₂O ⇄ H₂PO₄⁻ + H₃O⁺ pKa 2.14

H₂PO₄⁻ + H₂O ⇄ HPO₄⁻² + H₃O⁺ pKa 6.86

HPO₄⁻² + H₂O ⇄ PO₄⁻³ + H₃O⁺ pKa 12.38

The H₂PO₄⁻ works as amphoterous, it can be a base and acid, according to these equilibriums.

H₂PO₄⁻ + H₂O ⇄ HPO₄⁻² + H₃O⁺

H₂PO₄⁻ + H₂O ⇄ H₃PO₄ + OH⁻

pH 9.3 is located between 6.86 and 12.38 where we have this buffer system HPO₄⁻² / PO₄⁻³, where the HPO₄⁻² is another amphoterous:

HPO₄⁻ + H₂O ⇄ H₂PO₄⁻ + OH⁻

HPO₄⁻² + H₂O ⇄ PO₄⁻³ + H₃O⁺

The media from the two pKa, indicates the pH where the protonated form is in the same quantity as the unpronated form, so:

(6.86 + 12.38) /2 = 9.62

Above this pH, [PO₄⁻³] > [HPO₄⁻²].

In conclussion, at pH 9.3, [HPO₄⁻²] > [PO₄⁻³]

6 0

3 years ago

What is wrong with the following structure H-H-O

Strike441 [17]

Answer:

O atom requires 2 electrons to achieve octet structure and in this structure, it is only bonded to one H atom hence only obtaining an additional valence electron. Without a octet structure, the molecule is unstable hence this structure is incorrect. The correct structure should be H-O-H.

Explanation:

6 0

3 years ago