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4 years ago

Which of the following would have the highest buffer capacity?

Chemistry

1 answer:

Mrrafil [7]4 years ago

7 0

Answer:

1.25 M HCO₃⁻ / 1.25 M CO₃²⁻

Explanation:

Buffer capacity refers to the amount of a strong acid or base required per liter of the buffer to change its pH by one. This amount is directly related to the concentration of the conjugate acid-base pair in the buffer since the buffer pair neutralizes the strong acid or base.

Thus, the highest buffer capacity is found in the solution that has the highest concentration of the conjugate acid-base pair, which is 1.25 M HCO₃⁻ / 1.25 M CO₃²⁻ .

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3 years ago

Read 2 more answers

A student is given a solution of phenol red of unknown concentration. Solutions of phenol red are bright pink under basic condit

azamat

The hydrogen ion concentration, [H ], in the solution of phenol red solution of pH 11.20 is 6.3 X $10^{-12}$ moles/litre.

Explanation:

Data given:

basic solution of phenol red is given as it has pH of 11.2

hydrogen ion concentration = ?

the hydrogen ion concentration is calculated by using the following formula:

pH = - $log_{10}$ [ $H^{+}$ ]

Rearranging the equation:

[ $H^{+}$ ] = $\frac{1}{10^{pH} }$

Putting the values in the above equation:

[ $H^{+}$ ] = $\frac{1}{10^{11.2} }$

[ $H^{+}$ ] = 6.3 X $10^{-12}$ moles/litre

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4 years ago

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3 years ago

What amount of moles of sodium chloride is needed to prepare 1.25 L of a salt solution with a concentration of 0.750 mol/L

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Answer:

Number of moles = 0.94 mol

Explanation:

Given data:

Number of moles of sodium chloride = ?

Volume of sodium chloride = 1.25 L

Concentration of solution = 0.750 mol/L

Solution:

Formula:

Concentration = number of moles/ volume in L

By putting values.

0.750 mol/L = number of mole / 1.25 L

Number of moles = 0.750 mol/L×1.25 L

Number of moles = 0.94 mol

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3 years ago