Respuesta :
Answer:
B) The pH of a buffer solution does not change significantly when a small amount of acid is added.
C) The pH of a buffer solution is determined by the ratio of the concentration of acid to the concentration of base.
Explanation:
Buffer solution is useful in maintaining the pH of a solution constant . It is made of a weak acid and its salt or a weak base and its salt . Ph of a buffer is given by the following relation .
pH = pKa + log [ A⁻ ] / [ HA ]
A- is a base and HA is a weak acid .
When we add acid , it reacts with A⁻ or base and gets neutralised .
When we add base , it reacts with acid HA and gets neutralised . In this way it maintains the pH of the solution .
Correct statements are as follows:
B) When a tiny amount of solvent is introduced to a buffer, the pH doesn't really alter considerably.
C) The ratio of acids to base concentration determines the pH of a phosphate buffer.
So, options B) and C) are correct.
Define pH.
ph scale used in science to measure the acidity or alkalinity of an aqueous solution. pH originally stood for "potential of hydrogen." The pH of acidic solutions is lower than that of basic or alkaline solutions.
Correct statements are as follows:
B) When a tiny amount of solvent is introduced to a buffer, the pH doesn't really alter considerably.
C) The ratio of acids to base concentration determines the pH of a phosphate buffer.
So, options B) and C) are correct.
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