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Which of the following pairs can form a buffer solution?

HNO2 is a weak acid and NaNO2 is a salt that is formed by the combination with a strong base NaOH. Therefore, HNO2 and NaNO2 are the buffer pairs present.

What makes a buffer solution?

A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small amount of strong acid or base is added to it.

What is a buffer pair?

Buffer Solutions. Buffers do so by being composed of certain pairs of solutes: either a weak acid plus a salt derived from that weak acid or a weak base plus a salt of that weak base. For example, a buffer can be composed of dissolved CH3COOH (a weak acid) and NaCH3COO (the salt derived from that weak acid).

Which of the following pair will perform buffer action?

HNO3 and NH4NO3.

What is the purpose of a buffer op amp?

A buffer amplifier (sometimes simply called a buffer) is one that provides electrical impedance transformation from one circuit to another, with the aim of preventing the signal source from being affected by whatever currents (or voltages, for a current buffer) that the load may be produced with.

What is buffer transistor?

A Buffer Amplifier is an amplifier that isolates one circuit from another, and could provide amplification. A buffer might be used to impedance match an input circuit to an output circuit. This buffer uses an NPN transistor as the amplifier. …

How transistor is used as current amplifier?

Transistor amplifying current The small current travels from the voltage source into the base of the transistor. A current at the base turns on the transistor. The current is then amplified and travels from the emitter of the transistor to the collector.

Can transistors increase current?

A transistor can be used to increase current. You’ll have a low current path, from base to emitter in an NPN, and a higher current path from collector to emitter. The collector current will be a multiple of the base current if the circuit allows it.