Athula Karunathilake - Advanced Level Chemistry

Dear Student, Good day to you.
Single step Nucleophoc substitution reacton. bond breaking and bond formation at the same time . Due to the electronegativitity difference charge formation occured in C atom of Primary alkyl halide where the halogen atom connected . At this secnario the nucleoplile like hydroxide ion ready to donate pair of lectrons to the partially positive C atom of the alkyl halide where halogen atom connected.
secondary alkyl halide too follow single step nucleophilic substitution reactions.
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Cr₂O₇²⁻ + 3 SO₂ + 2 H⁺ → 2 Cr³⁺ + 3 SO₄²⁻ + H₂O -Net IONOC REACTION
+ 3 SO₂ + H₂SO₄ → Cr₂(SO₄)₃ + K₂SO₄ + H₂O- Full Reaction
⁻ + 14 H⁺ + 6 e⁻ → 2 Cr³⁺ + 7 H₂O - Reduction
+ 2 H₂O → SO₄²⁻ + 4 H⁺ + 2 e⁻ -Oxidation
#3 SO₂ + 6 H₂O → 3 SO₄²⁻ + 12 H⁺ + 6 e⁻ - Multify to balance electron
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COVID-19 has brought unprecedented challenges for us all which is why now more than ever is an important time to reach out to someone and start a conversation.

Reach out to a friend, a family member, or even someone you haven't spoken to in a while and ask R U OK? It is important to stay connected and to remember there is more to say after R U OK?