Answer: Your teacher is correct, although yes not every element has a charge of 0.
Explanation:
Atoms are electrically neutral because they contain equal quantities of positively charged protons and negatively charged electrons. Electrons and protons have equal but opposite charges, so the result is no net charge.
Answer:
During this reaction electron is transfer from copper to silver.
Explanation:
Ionic equation:
Cu + 2Ag⁺ → Cu²⁺ + 2Ag
Given equation shows that the silver on left hand side is present in the form of cation. The charge on silver is +1 it means one electron is lost by one silver atom. While copper is present in neutral form with oxidation state zero.
Thus copper lose two electron and gain +2 charge these two electrons are accepted by two silver atoms and became neutral.
This equation shows the redox reaction.
Silver gets reduced by gaining the electron and copper gets oxidized by losing the electrons.
Oxidation:
Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.
Reduction:
Reduction involve the gain of electron and oxidation number is decreased.
A chemical reaction expressed in words rather than a chemical formula
For a reaction to be spontaneous under standard conditions at all temperatures, the signs of ΔH° and ΔS° must be negative and positive, respectively.
<span>Gibbs free energy (G) determines if reaction will proceed
spontaneously, if </span>ΔG is negative, reaction is spontaneous.<span>
ΔG = ΔH - T·ΔS.
ΔG - changes in Gibbs free energy.
ΔH - changes in enthalpy.
ΔS - changes in entropy.
T is temperature in Kelvins.</span>
