Answer:
The anode made of the impure copper
The cathode made of pure copper
The electrolyte of copper (II) sulfate CuSO₄ solution
The silver impurities at the anode due to their high tendency of accepting electrons and being a stronger reducing agent than either copper or zinc will remain relatively in place and relatively stable and will not actively take part in the oxidation reaction taking place at the anode
The zinc impurities will be the first element of the three metals to give up electrons and go into the solution as zinc ions due to their high tendency to loan out two electrons and become oxidized into Zn²⁺ ions
The drawing of the electrolytic cell created with Microsoft Visio is attached
Explanation:
This problem is providing us with the chemical equation for the decomposition of water to hydrogen and oxygen, the involved bond energies and asks for the total energy of the reaction as well as whether it is endothermic or exothermic. At the end, one comes to the conclusion that it is exothermic because the total energy is -425 kJ.
<h3>Bond energy:</h3>
In chemistry, bond energies are defined as the necessary energy to break a bond between two atoms. In this case, we see that water, H2O has two H-O bonds and hydrogen and oxygen have two H-H and one O=O bonds, respectively.
Thus, we write the following heat equation, which comprises the aforementioned bond energies and the stoichiometric coefficients in the reaction:
Hence, we plug in the given bond energies to obtain:
Where the negative suggests this is an exothermic reaction as it releases energy (negative enthalpy).
Learn more about bond energies: brainly.com/question/26141360
Hey there!
Molar mass NaCl = 58.44 g/mol
Number of moles
n = mass of solute / molar mass
n = 59.76 / 58.44
n = 1.0225 moles of NaCl
Volume in liters:
270 mL / 1000 => 0.27 L
Therefore:
M = number of moles / volume ( L )
M = 1.0225 / 0.27
= 3.78 M
Hope that helps!
Answer:
True for water: a. In a phase diagram the solid-liquid coexistance line has a negative slope. d. the solid is less dense than the liquid. f. the molecules are closest in the liquid phase. g. Higher pressure will cause the solid to become liquid.
True for most other substances: b. In the phase diagram the solid-liquid coexistance line has a positive slope. c. the solid is more dense than the liquid. e. the molecules are closest in the solid phase. h. higher pressure will cause the liquid to become solid.
Explanation:
Liquid water is usually more dense than the solid ice. This is in contrast to most other substances. In addition, the phase diagram of liquid water is different from those of other substances because of the signs of their slopes. The presence of high pressure can change ice to liquid water while for other substances the presence of high pressure will change liquid to solid.