The cell notation of a standard galvanic (voltaic) cell containing an unknown metal Y is shown below. Y (s) | Y2+ (aq) || Cu2+ (aq) | Cu (s) 6.1 What do the single vertical lines (|) in the cell notation represent? 6.2 State TWO standard conditions for the cell. 6.3 Write down the NAME or FORMULA of the oxidising agent. 6.4 Identify the polarity of the: 6.4.1 Anode 6.4.2 Cathode 6.5 The initial reading on a voltmeter connected across the electrodes is 1.10 V. Use a calculation to identify metal Y.

NSC English General Technical Sciences Processes and redox reactions taking place in galvanic cells: The cell notation of a standard

The cell notation of a standard galvanic (voltaic) cell containing an unknown metal Y is shown below - English General - NSC Technical Sciences - Question 6 - 2022 - Paper 2

Question 6

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The cell notation of a standard galvanic (voltaic) cell containing an unknown metal Y is shown below. Y (s) | Y2+ (aq) || Cu2+ (aq) | Cu (s) 6.1 What do the single... show full transcript

Worked Solution & Example Answer:The cell notation of a standard galvanic (voltaic) cell containing an unknown metal Y is shown below - English General - NSC Technical Sciences - Question 6 - 2022 - Paper 2

Step 1

What do the single vertical lines (|) in the cell notation represent?

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Answer

The single vertical lines (|) in the cell notation represent the phase boundaries or interfaces between the different states of matter in the galvanic cell. They indicate the separation between the solid and aqueous phases.

Step 2

State TWO standard conditions for the cell.

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Answer

The concentration of ions involved in the reactions must be 1 mol/dm³.
The temperature at which the cell operates must be 25 °C (298 K).

Step 3

Write down the NAME or FORMULA of the oxidising agent.

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Answer

The oxidising agent in this galvanic cell is Copper(II) ions, represented as Cu²+.

Step 4

Identify the polarity of the:

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Answer

6.4.1 Anode: Negative 6.4.2 Cathode: Positive

Step 5

The initial reading on a voltmeter connected across the electrodes is 1.10 V. Use a calculation to identify metal Y.

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Answer

To identify metal Y, we can use the standard cell potential equation:

$E_{cell} = E_{cathode} - E_{anode}$

Given the cell potential ( 1.10 V), we can assume:

For Cu, $E_{cathode} = +0.34 ext{ V}$ (standard reduction potential). We need to find $E_{anode}$ for metal Y.

Rearranging gives us:

$E_{anode} = E_{cathode} - E_{cell}$

Plugging in the values:

$E_{anode} = 0.34 ext{ V} - 1.10 ext{ V} = -0.76 ext{ V}$

Using standard reduction potentials, if Y is Zinc (Zn), then $E_{Zn} = -0.76 ext{ V}$ . Therefore, metal Y is Zinc (Zn).

The cell notation of a standard galvanic (voltaic) cell containing an unknown metal Y is shown below - English General - NSC Technical Sciences - Question 6 - 2022 - Paper 2

Worked Solution & Example Answer:The cell notation of a standard galvanic (voltaic) cell containing an unknown metal Y is shown below - English General - NSC Technical Sciences - Question 6 - 2022 - Paper 2

What do the single vertical lines (|) in the cell notation represent?

State TWO standard conditions for the cell.

Write down the NAME or FORMULA of the oxidising agent.

Identify the polarity of the:

The initial reading on a voltmeter connected across the electrodes is 1.10 V. Use a calculation to identify metal Y.

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