When a piece of cadmium (Cd) is placed a solution of nickel chloride (NICI2), the following reaction occurs: + NiCl2 (aq) → CdCl2 (aq) + Ni (s) Cd (s) During this reaction cadmium (Cd) atoms are converted to Cd2* ions while Ni2* ions are converted to nickel (Ni) atoms. Use the equation above to answer the following questions. 1. Cadmium solid consists of neutral atoms. Give the number of protons and electrons in a cadmium atom. protons _electrons 2. Cadmium atom is a (neutral or charged) particle 3. CdCl2 contains Cd2* ions. Give the number of protons and electrons in a Cd2* ion protons electrons 4. Cadmium ion is a (neutral or charged) particle 5. Cd atoms are (fosing or gaining ) two electrons in the reaction. 6. Cd atoms are being (oxidized or reduced) in the reaction. 7. NI2* ions are (losing or gaining ) two electrons inthe reaction. 8. Ni2* ions are being (oxidized or reduced) in the reaction.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
![When a piece of cadmium (Cd) is placed a solution of nickel chloride (NICI2), the following reaction occurs:
Cd (s)
+ NiCl2 (aq) - CdCl2 (aq) + Ni (s)
During this reaction cadmium (Cd) atoms are converted to Cd2+ ions while NI2+ ions are converted to nickel (Ni) atoms. Use the equation above to answer the following
questions.
1. Cadmium solid consists of neutral atoms. Give the number of protons and electrons in a cadmium atom.
protons
electrons
2. Cadmium atom is a
(neutral or charged) particle
3. CdCl2 contains Cd2+ ions. Give the number of protons and electrons in a Cd2+ ion
protons
electrons
4. Cadmium ion is a
(neutral or charged) particle
5. Cd atoms are
(losing or gaining ) two electrons in the reaction.
6. Cd atoms are being
(oxidized or reduced) in the reaction.
7. Ni2+ ions are
(losing or gaining) two electrons inthe reaction.
8. Ni2* ions are being
(oxidized or reduced) in the reaction.
9. According to the reaction above, Cd is a
(more or less) active metal than Ni.
10. Cadmium (Cd) would be located
(above or below) nickel (Ni) on the "activity series".
(Yes or No)
11. Would you expect a reaction to occur if a piece of nickel (Ni) is placed in a solution of cadmium(II) chloride (CdCI2)?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F00e08a2d-39a0-4a6b-8056-c883923b899c%2F50bd3306-9562-496f-bb4c-f40ce72aee0f%2F6818f6r_processed.png&w=3840&q=75)
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