Buffers
Quiz by Aji Budiyanto
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10 questions
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- Q1Buffer is defined as...ability to resist a pH increaseability to prevent pH from decreasingability to resist pH change when small amount of acid or base are addedability to resist pH change45s
- Q2Acidic buffer is made up of...weak acid and its conjugate basestrong acid and its conjugate baseweak acid and weak baseweak acid and its conjugate salt45s
- Q3Basic buffer is made up of...weak base and its conjugate acidweak base and weak acidstrong base and its conjugate acidweak base and its conjugate salt45s
- Q4Which two solutions of equal volume and concentration mixed together to form a buffer?Nitric acid and potassium hydroxideNitric acid and potassium nitratePropanoic acid and potassium propanoatePropanoic acid and potassium hydroxide45s
- Q5Which mixture of strong acid and weak base could produce a buffer solution?40 ml NaOH 0.1 M + 60 ml HCl 0.1 M40 ml HCl 0.1 M + 60 ml NH3 0.1 M40 ml NH3 0.1 M + 60 ml HCl 0.1 M40 ml HCl 0.1 M + 60 ml NaOH 0.1 M60s
- Q6A buffer has a pH of 4.85 and contains formic acid and potassium formate. What can you conclude about the concentrations of the components of the buffer? The Ka of formic acid is 1.8 x 10-4.Formic acid > Potassium formateFormic acid = Potassium formateFormic acid < Potassium formateMore information is needed to determine the relative concentrations120s
- Q7What is the pH of a buffer that is 0.08 M NaA and 0.1 HA. The Ka of HA = 1.0 x 10-443.92.194.1120s
- Q8What might happen if buffers did not exist within the human body?Our blood and other bodily fluids might become too acidic or basic.Our stomach acid would not be able to break down food.We would not be able to inhale oxygen into our lungs.We would not be able to process glucose within our cells.45s
- Q9Buffers allow us to keep...Cell transportSelective permeabilityDynamic equilibriumHomeostasis45s
- Q10Two beakers have liquids in them. When you add a base such as ammonia to beaker 1, the pH did not change. But when you add ammonia to beaker 2, the pH changes. Choose the possibility of those solutions.Beaker 2 contained an acid.Beaker 1 contained a buffer and Beaker 2 contained only water.Beaker 1 had only water and Beaker 2 contained a buffer.The beaker that changed pH contained a buffer.45s