
Concept explainers
The concentration of a hydrogen peroxide solution can be conveniently determined by titration against a standardised potassium permanganate solution in an acidic medium according to the following unbalanced equation:
(a) Balance this equation. (b) If 36.44 mL of a

Interpretation:
The balance equation for the given reaction and the molarity of
Concept introduction:
Oxidation is the addition of the electronegative element and the removal of the electropositive element in a chemical reaction. Reduction is the addition of the electropositive element and the removal of the electronegative element in a chemical reaction.
The chemical reaction in which oxidation and reduction take place simultaneously or the gain and loss of electrons take place in the chemical reaction is called a redox reaction.
A galvanic cell is made up of two half-cells that are cathodic and anodic. This cell converts chemical energy into electrical energy.
When the cell constant is positive and free energy is negative, then the reaction will occur spontaneously.
Answer to Problem 67AP
Solution:
a)
The overall balanced equation is as follows:
b)
Explanation of Solution
a) Balance the equation
Consider that the galvanic cellis made up of
The cell diagram is as follows:
The number of electrons that takes part in the two half-cell reactions should be the same.
Adding the two half-cell reactions gives the overall cell reaction, which is as follows:
Hence, the overall balanced equation is as follows:
b) Molality of the
The volume of
The number of moles of
Substitute the value of the concentration and the volume in the above expression as follows:
The overall balanced equation is as follows:
From the balance equation, 2 moles of
The number of moles of
The molarity of
Substitute the value of the number of moles and the volume in the above expression as follows:
Therefore, the molarity of
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Chapter 19 Solutions
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- calculate the equilibrium concentration of H2 given that K= 0.017 at a constant temperature for this reaction. The inital concentration of HBr is 0.050 M.2HBr(g) ↔ H2(g) + Br2(g)a) 4.48 x 10-2 M b) 5.17 x 10-3 Mc) 1.03 x 10-2 Md) 1.70 x 10-2 Marrow_forwardtrue or falsegiven these two equilibria with their equilibrium constants:H2(g) + CI2(l) ↔ 2HCI(g) K= 0.006 CI2(l) ↔ CI2(g) K= 0.30The equilibrium contstant for the following reaction is 1.8H2(g) + CI2 ↔ 2HCI(g)arrow_forwardI2(g) + CI2(g) ↔ 2ICIK for this reaction is 81.9. Find the equilibrium concentration of I2 if the inital concentration of I2 and CI2 are 0.010 Marrow_forward
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