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Chapter 4: Q8E (page 842)

Current passes through a solution of sodium chloride. In

1.00s,2.68脳1016Na+ions arrive at the negative electrode and3.92脳1016CI-

ions arrive at the positive electrode. (a) What is the current passing between

the electrodes? (b) What is the direction of the current?

Short Answer

Expert verified

a) The current passing between the electrodes is .

b) The direction of current is towards the negative electrode.

Step by step solution

01

Define the current I .

The charge Q per unit time t is known as the currentI.

I=Qt

Here, I is current in ampere A, Q is charge in Columbus Cand is time in secs.

02

Determine the value of the current.

(a)

Determine the current between the electrodes as:

I=Qt=numberofNa++numberofCI-脳qt=2.68脳1016+3.92脳1016脳-1.6脳10-191.00=10.56mA

Hence, current passing between the electrodes is 10.56mAand the direction of current is towards the negative electrode.

03

Determine the direction of current.

(b)

Since, the value of the current is positive so the charge flows from positive side to

the negative electrodes.

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