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3 years ago

What kind of chemical reaction these equations represent.

Chemistry

1 answer:

Sedbober [7]3 years ago

7 0

I believe it would be combustion because of the products CO2 and then C+2H2

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A buffer with a pH of 4.31 contains 0.31 M of sodium benzoate and 0.24 M of benzoic acid. What is the concentration of [ H 3 O ]

Mnenie [13.5K]

Answer: The hydronium ion concentration in the solution is $1.29\times 10^{-4}M$

Explanation:

To calculate the molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Moles hydrochloric acid solution = 0.060 mol

Volume of solution = 1 L

Putting values in above equation, we get:

$\text{Molarity of HCl}=\frac{0.060}{1L}\\\\\text{Molarity of HCl}=0.060M$

The chemical reaction for aniline and HCl follows the equation:

$C_6H_5COO^-+HCl\rightarrow C_6H_5COOH+Cl^-$

Initial: 0.24 0.060 0.31

Final: 0.18 - 0.37

To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:

$pH=pK_a+\log(\frac{[\text{conjugate acid}]}{[\text{base}]})$

$pH=pK_a+\log(\frac{[C_6H_5COO^-]}{[C_6H_5COOH]})$

We are given:

$pK_a$ = negative logarithm of acid dissociation constant of benzoic acid = 4.2

$[C_6H_5COO^-]=0.18M$

$[C_6H_5COOH]=0.37M$

pH = ?

Putting values in equation 1, we get:

$pH=4.2+\log(\frac{0.18}{0.37})\\\\pH=3.89$

To calculate the hydronium ion concentration in the solution, we use the equation:

$pH=-\log[H_3O^+]$

pH = 3.89

Putting values in above equation, we get:

$3.89=-\log[H_3O^+]$

$[H_3O^+]=10^{-3.89}=1.29\times 10^{-4}M$

Hence, the hydronium ion concentration in the solution is $1.29\times 10^{-4}M$

3 0

3 years ago

What is the value of the specific heat capacity of liquid water in j/mol·°c?

Scilla [17]

he specific heat capacity of liquid water is 4.186 J/gm K.

4 0

3 years ago

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Percent yield of 0.20 g of Al

elena-14-01-66 [18.8K]

Answer:

the dividend yield is 4%

Explanation:

The computation of the dividend yield is as follows:

Dividend yield = Dividend per share ÷ current share price per share

= ($0.20 × 4 quarters) ÷ $20

= $0.80 ÷ $0.20

= 4%

hence, the dividend yield is 4%

The same is determined by applying the above formula

7 0

3 years ago

Displacement is called vector quantity. Why?

Irina18 [472]

Answer:

Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

Explanation:

6 0

4 years ago

The theories of continental drift and sea-floor spreading combined to make the theory of _______. A. supercontinents B. rejoined

GarryVolchara [31]

Do not know this answer

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4 years ago

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