What Is the PH of a Buffer Solution That Is

question 60

Multiple Choice

What is the pH of a buffer solution that is 0.266 M in lactic acid and 0.111 M in sodium lactate? The K_a of lactic acid is 1.4 × 10^-4.

• A)14.38
• B)10.53
• C)5.38
• D)3.47
• E)4.23

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Definitions:

Retentive

Memory or functions in a control system that retain their value or state even after the system is powered down or rebooted.

Nonretentive

In PLC programming, a term referring to memory or data that is not retained after power loss.

Retentive Timer Reset

A function in PLC programming that allows a timer to retain its accumulated value even after a reset condition has been removed or power to the PLC has been cycled.

Timer Resets

The process of returning a timer to its initial state or set value in control systems or programming.