Calculate the [OH^-] in an Aqueous Solution That Is 0

question 83

Multiple Choice

Calculate the [OH^-] in an aqueous solution that is 0.125 M NH₃ and 0.300 M NH₄Cl.The value of K_b for NH₃ is 1.8 *10^-5.

• A)0.425 M
• B)0.125 M
• C)1.8 * 10^-5 M
• D)7.5 *10^-6 M
• E)4.3 * 10^-5 M

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Definitions:

Off Delay Cycle

A control or timing function where a signal or operation is delayed from turning off after an input trigger is removed.

MCR Instruction

Master Control Reset, an instruction used in programming PLCs to control the execution of a block of logic or instructions between its start and end points.

Nonretentive Outputs

Output signals or data in a control system that do not maintain their state after a power cycle or reset.

Latch Instruction

One-half of an instruction pair (the second instruction of the pair being the unlatch instruction) that emulates the latching action of a latching relay. The latch instruction for a programmable logic controller energizes a specified output point or internal coil until it is de-energized by a corresponding unlatch instruction.