reaction 2K+Br2->2K+ + 2Br-, chemistry homework help

1. In the following reaction, which species is reduced? 2K + Br 2 →2K + + 2Br - 2. Arrange the following in order of increasing oxidation number of the sulfur atom 3. The oxidation number of the sulfur atom in the SO 2/4- ion is 4 .A half -reaction involves a change in the oxidation state of an element. always contains H 2O molecules. always contains H + ions. All of the above 4. In the following reaction, which is the oxidizing agent? AgNO 2+ Cl 2 + 2KOH → AgNO 3 + 2KCl + H 2O 5. What are the oxidation states (in increasing order) of the elem ent that undergoes disproportionation in the following reaction: Cl2 + H 2O → HCl + HOC Which reaction is a redox reaction? Al2O3 + 6HCl → 2AlCl 3+ 3H 2O 2HCO -3 → CO 2+ CO 2/3 - + H 2O SiBr 4 +3H 2O → H2SiO 3 + 4HBr H2O + PbO 2 → NaOH + KCl → KClO + NaPb(OH) 6. Which answer contains the correct information about the following reac tion: 2Pb(NO 3)2 → 2PbO + 4NO 2- + O 2 This reaction is a decomposition reaction and not a redox reaction. This reaction is a redox reaction in which the lead is reduced and the oxygen is oxidized. This reaction is a disproportionation reaction. This reaction is a redox reaction in which the nitrogen is reduced and the oxygen is oxidized