Michael Faraday made his discovery of electromagnetic induction in 1831. He hypothesized that a changing magnetic field is neces
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Answer : The incorrect statements are:
(A) When two nonmetals react, the compound formed is ionic.
(B) Two nonmetals can undergo an oxidation-reduction reaction.
Explanation :
Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.
The covalent compound are usually formed when two non-metals react.
The two nonmetals can not undergo an oxidation-reduction reaction.
Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.
Ionic compound are usually formed when a metal reacts with a non-metal.
The metal-nonmetal reaction can always be assumed to be an oxidation-reduction reaction.
For example :
In this reaction, sodium shows oxidation because the oxidation state changes from (0) to (+1) and and chlorine shows reduction because the oxidation state changes from (0) to (-1).
Hence, the incorrect statements are, (A) and (B)
Answer:
see below
Explanation:
Aqueous hydroiodic acid reacts with liquid water in a reversible reaction.
2 HI + 2 H₂O ⇔ 2 H₃O + I₂
This is an acid-base reaction. HI is the acid, and H₂O is the base. The conjugate acid is H₃O, and the conjugate base is I₂. You can figure out the acid and base by a using a table of strong/weak acids and bases. The conjugate will have one less or one more H⁺ depending on if it's an acid or a base.
The expression for Kₐ of the reaction is below. You have to put the acid and its conjugate base on the top and the base and its conjugate on the bottom. I didn't put in H₂O since, although it is the base in this equation, it isn't really a base.
Solid zinc reacts with solid manganese (IV) oxide producing solid zinc oxide and solid manganese (III) oxide.
Zn + 2 MnO₂ ⇒ ZnO + Mn₂O₃
This is a redox reaction. The Zn is being oxidized, and the Mn is being reduced.
Oxidation: Zn ⇒ Zn⁺² + 2 e⁻
Reduction: Mn⁺⁴ + e⁻ ⇒ Mn⁺³
Aqueous silver nitrate reacts with aqueous calcium chloride.
2 AgNO₃ + CaCl₂ ⇒ 2 AgCl + Ca(NO₃)₂
This is a precipitation reaction. You have two soluble salts combing to form a solution. You now need to figure out which of the compounds produced are not soluble. AgCl is the compound that is not soluble in water, making it the precipitate.
I think I covered everything. If I missed something let me know.