Question

Question 8 (3 points) 4th row periodic trend involving metal cations, such as potassium, calcium, iron(ili) and copper(II)ions form, acidic solutions via the hydrolysis of water and the Arrhenius model. True False

Answer 1

8 No All the Kt, (at2, Fet3, Cat2 are metalions They forms basic solution with water Koha strong base ca (6H)2, Fe(OH)3, (46H), are weak bases Answer: False 7 Disproportionation of bicarbonate 2H Což - H2CO3+ co32 But this is not an example of disproportionation realian because there is no change in the oxidation number of any element in the above reaction. In disproportionation reactions, same element undergoes both oxudation and reduction. . Answer: False IA group oxidy forms strong basic solution in H₂O Lizot H2o 2 high Nazot H2o All are strong bases K₂O + H₂O Rb₂O + H₂O 420 + H2O correct answer is All group IA (1) metal oxides option 4 - 2 Nach 2 koh 2 Rbolt 2 csot