1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stellarik [79]
2 years ago
6

A 0.0884 M solution of a weak base has a pH of 11.79. What is the identity of the weak base?Weak Base KbEthylamine (CH3CH2NH2) 4

.7 x 10-4Hydrazine (N2H4) 1.7 x 10-6Hydroxylamine (NH2OH) 1.1 x 10-8Pyridine (C5H5N) 1.4 x 10-9Aniline (C6H5NH2) 4.2 x 10-10A) hydrazineB) pyridineC) anilineD) ethylamineE) hydroxylamine
Chemistry
1 answer:
iVinArrow [24]2 years ago
7 0

Answer:

The base must be ethylamine.

Explanation:

The pH of solution of a weak base gives us an idea about the Kb of the base.

pOH=14-pH

pOH=14-11.79=2.21

pOH=-log[OH^{-}]

[OH^{-}]=0.0062M

The relation between Kb and hydroxide ion concentration is:

Kb=\frac{[OH^{-}]^{2}}{[base]}

Kb=\frac{0.0062X0.0062}{0.0884}=4.34X10^{-4}

Thus the weak base must be ethylamine.

You might be interested in
Select the correct answer.
Svetlanka [38]

Answer:

alcohol

I hope this helps you

7 0
3 years ago
Which of these outcomes is conclusive evidence that mixing sugar in water is a physical change?
lions [1.4K]
There is no molecular change

8 0
2 years ago
GT bisects BN at point G.<br><br> If BN = 24 find BG
LenaWriter [7]

Answer:

12

Explanation:

If GT bisects BN at point G, then point G would be in the middle of BN. So, since Bg and NG have to be equal and add up to 24, then the answer is 12.

4 0
2 years ago
Chrysanthenone is an unsaturated ketone. If Chrysanthenone has M+ = 150 and contains 2 double bond(s) and 2 ring(s); what is its
snow_lady [41]

Answer:

the Molecular formula will be; C10H14O

Explanation:

Given the data in the question;

Chrysanthenone is an unsaturated ketone,

it has M+ = 150 and contains 2 double bond(s) and 2 ring(s).

molecular formula = ?

we know that ketone contain 1 oxygen and mass of oxygen is 16

so mass of the C and H remaining will be;

⇒ 150 - 16 = 134

Now we determine the number of C atoms;

⇒ 134 / 13 = 10

hydrocarbon with 10 hydrogen atom have CnH2n+2 means

⇒ ( 10 × 2 ) +2 = 22 hydrogens

But then we have 3 unsaturation meaning 6 hydrogens less and also we have ring meaning 2 more hydrogens

⇒ 22 - 6 - 2 = 14

Hence the Molecular formula will be; C10H14O

4 0
2 years ago
Need help with questions 1 &amp; 2 please even if you give me a hint ❤️
Fed [463]

For Number 1, the rate changes multiple times. Some times it goes up .4 and sometimes it remains the same. I think you may need to check you work to get a more fluent flow for rate of change.

6 0
3 years ago
Other questions:
  • Compare the chemical a d structural formulas of butane and isobutane
    15·1 answer
  • Which of the following must be the same for two isotopes of an element? A. The number of neutrons B. The atomic number C. The ma
    15·2 answers
  • Why is water considered a pure substance and not a mixture?
    7·2 answers
  • The two stages of cellular respiration.
    12·1 answer
  • Which of the following elements can have an expanded octet when they form covalent compounds with other elements?
    10·2 answers
  • How many moles of gold, Au, are in 3.60 x 10^-5 g of gold?
    12·1 answer
  • How many moles contain 9.75x10^20 molecules of carbonic acid?
    10·1 answer
  • What is the outre layer and large part of the sun´s atmosphere
    13·1 answer
  • Household ammonia used for cleaning contains about 10 g (two significant figures) of NH3 in 100 mL (two significant figures) of
    11·1 answer
  • Consider two different solutions of the same UV-absorbing compound. Upon UV-analysis, Solution B gave an absorbance of 1.0 and S
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!