________ function by absorbing excess hydrogen or hydroxide ions.
2 answers:
Answer: Buffer solution
Explanation:
Buffer is a solution which resists changes in pH when small quantities of acid or alkali are added to it.
It is formed by combination of weak acid and salt of weak acid with strong base called as acidic buffer.Example: and
Or it is formed by combination of weak base and salt of weak base with strong acid called as basic buffer buffer. Example: and
When acid is added to buffer, the buffer releases ions to neutralize the acid added and when base is added to buffer, the buffer releases
ions to neutralize the base added.
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The pressure gets increased to 486 kPa from 405 kPa, when the volume is decreased from 6 cm³ to 4 cm³.
Explanation:
In the present problem, the temperature is said to remain at constant and there is change in the pressure. So according to Boyle's law, the relationship between pressure and volume of any gaseous objects are inversely related to each other. In other words, the pressure attained by gas molecules in a container will be inversely proportional to the volume of the gas molecules occupied in the container, at constant temperature.
So, if two volumes V₁ and V₂ are considered, then their respective pressure will be represented as P₁ and P₂. Then, as per Boyle's law,
So let us consider, V₁ = 6 cm³ and V₂ = 4 cm³ and pressure P₁ = 405 kPa and we have to determine P₂.
Then,
So, the pressure at new volume of 4 cm³ is 486 kPa. It can be seen that as there is decrease in the volume, there is an increase in the pressure. So it satisfied the Boyle's law.
Thus, the pressure gets increased to 486 kPa from 405 kPa, when the volume is decreased from 6 cm³ to 4 cm³.