Answer:
Explanation:
The second line in the Pfund series corresponds to a transition from n = 7 to n = 5.
To calculate the wavelength of the transition, we can use the Rydberg equation:
where
If n₁ = 5 and n₂ = 7
We have to predict the potential, whether reaction is spontaneous or not, direction of electron flow, gain/loss of mass at electrode.
The correct answers are:
The reactions are Al(s) → Al³⁺(aq) + 3e⁻ and Zn²⁺(aq) + 2e⁻ → Zn(s). The standard electrode potential for Al/Al³⁺ is +1.18 volts and that of Zn²⁺/Zn is -0.76 volts.Zn²⁺/Zn cathode and Al/Al³⁺ is anode.
(a) Cell potential= Cathode potential - Anode potential
Cell potential= E°(Zn²⁺/Zn) - E°(Al/Al³⁺)
Cell potential= (-0.76- 1.18) volts= -1.94 volts.
(b) As E° value is negative, ΔG° is positive. Hence, the reaction will not occur spontaneously.
(c) Electron will flow from anode to cathode.
(d) Anode (Al/Al³⁺) will lose mass and cathode (Zn²⁺/Zn) will gain mass.
I would say that the answer is A. A pot of soup is 50 grams of salt per liter because B. has a lower gram of salt per liter and in C if you divide 360 by 10 you would get 36 grams of salt per liter