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3 years ago

I will give brainliest to correct answer - no links

Chemistry

2 answers:

WINSTONCH [101]3 years ago

6 0

Answer:

C - 23cm

Explanation:

Lostsunrise [7]3 years ago

5 0

Answer:

Explanation:

cuz si senor.

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The equilibrium concentrations of the reactants and products are [HA]=0.280 M, [H+]=4.00×10−4 M, and [A−]=4.00×10−4 M. Calculate

Tems11 [23]

Answer:

6.24

Explanation:

The following data were obtained from the question:

Concentration of HA, [HA] = 0.280 M,

Concentration of H+, [H+] = 4×10¯⁴ M

Concentration of A-, [A−] = 4×10¯⁴ M

pKa =.?

Next, we shall write the balanced equation for the reaction. This is given below:

HA <===> H+ + A-

Next, we shall determine the equilibrium constant Ka for the reaction. This can be obtained as follow:

Equilibrium constant for a reaction is simply the ratio of concentration of the product raised to their coefficient to the concentration of the reactant raised to their coefficient.

The equilibrium constant for the above equation is given below:

Ka = [H+] [A−] /[HA]

Concentration of HA, [HA] = 0.280 M,

Concentration of H+, [H+] = 4×10¯⁴ M

Concentration of A-, [A−] = 4×10¯⁴ M

Equilibrium constant (Ka) =

Ka = (4×10¯⁴ × 4×10¯⁴) / 0.280

Ka = 1.6×10¯⁷/ 0.280

Ka = 5.71×10¯⁷

Therefore, the equilibrium constant for the reaction is 5.71×10¯⁷

Finally, we shall determine the pka for the reaction as follow:

Equilibrium constant, Ka = 5.71×10¯⁷

pKa =?

pKa = – Log Ka

pKa = – Log 5.71×10¯⁷

pKa = 6.24

Therefore, the pka for the reaction is 6.24.

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3 years ago

Select the correct answer.

Elina [12.6K]

Answer:

Explanation:

Cu is the correct answer if I'm correct

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2 years ago

How many moles of lithium are in 83 grams of lithium?

german

1 moles lithium or 6.941 grams

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Complete the electron-dot structure of s-allylcysteine, showing all lone-pair electrons.

erastova [34]

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Is Sucrose a ionic or covalent bond

yKpoI14uk [10]

Answer:

covalent bond

Explanation:

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