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soldier1979 [14.2K]
2 years ago
12

Match: Substance ....... Definition Lewis acid A. Provides H+ in water Bronsted-Lowry base B. Provides OH - in water Arrhenius b

ase C. Proton donor D. Proton acceptor E. Electron pair donor F. Electron pair acceptor
Chemistry
1 answer:
Igoryamba2 years ago
3 0

Answer: F.    Electron pair acceptor

Explanation:

A Lewis acid can be properly defined as any substance such as  H+ (hygrogen ion) that can accept a pair of electron.

While a Lewis base is any substance such as (OH-) that can donate a pair of electron.

In the neutralization reaction between an acid ( H+ ) and a base (OH-). Hydrogen ion (H+ ) is the Lewis acid because it accepts an electron pair from (OH-).

Other examples of Lewis acid are;  Mg2+, K+

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Treatment of 2,4,6-tri-tert-butylphenol with bromine in cold acetic acid gives the compound C18H29BrO in quantitative yield. The
Cloud [144]

Answer:

2,4,6-tri-tert-butylcyclohexa-2,5-dienone

Explanation:

1. Information from the formulas

C₁₈H₃₀O ⟶ C₁₈H₂₉BrO

A Br has replaced an H.

2. Information from the reaction

These look like the conditions for an electrophilic aromatic substitution.

3. Possible mechanism (Fig. 1)

The product must be highly symmetrical, because there are so few NMR signals.

(i) The bromonium ion attacks at the para position, forming a resonance-stabilized carbocation intermediate.

(ii) A bromide ion attacks the H of the hydroxyl group to form 2,4,6-tri-tert-butylcyclohexa-2,5-dienone.

4. Confirmatory evidence (Fig. 2)

(a) Infrared  

1630 cm⁻¹:  C=O stretch

1655 cm⁻¹ : C=C stretch

(b)NMR

1.2 (9h, s):    the 4-tert-butyl group

1.3 (18H, s): the 2- and 6- tert- butyl groups

6.9 (2H, s):    the alkene H atoms

The ratio is 9:18:2.

3 0
3 years ago
10)
VARVARA [1.3K]
I think it’s HCI ......
6 0
3 years ago
Which describes the correct procedure when converting a number from scientific notation to standard notation? A If the power of
MissTica

Answer:

I think it's B

Explanation:

I think it is b because if the number is positive the zeroes will be on the left so you move the decimal to the right to get rid of the zeroes.

6 0
3 years ago
Sketch the structure of the nitrogen containing product that is formed when ethalymine reacts with water.
Igoryamba

Answer:

Here's what I get  

Explanation:

Ethylamine has an N atom with a lone pair of electrons.

It can act as a Brønsted-Lowry base and accept a proton from water and become an ethylammonium ion.

The structure of the ion is shown below (there is a C atom at each of the four-way bond intersections).

3 0
2 years ago
How many grams are in 6.50 moles of h2so4?
GREYUIT [131]
You multiply 6.50 by the molar mass of H2SO4. 
7 0
3 years ago
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