Which of the following is INCORRECTLY classified as ionic versus covalent? H_2oi

Question

Which of the following is INCORRECTLY classified as ionic versus covalent? H_2ois an ionic compound NO_2is a an aient compound CO_2is a an aient compound Ca_Ois an ionic compound NH-_4Cl is an ionic compound Which of the following is the correct formula for the compound with the name copper (II) nitrate? Based on the solubility rules, which one of the following should be soluble in water What particle is transferred from one reactant to another in oxidation- reduction reactions? In the following reaction, what species is the oxidi/ing agent?

Explanation / Answer

45. H2O is a covalent compound, not ionic compound. H2O is form by sharing of e-.

46. copper (II) nitrate Cu(NO),

47 Calcium phosphate molar mass: 310.18 g/mol

40.078 ; mass of Ca*3 + (30.973761, mass of P + 15.9994, mass of O*4)*2

48.

Na2S is soluble in water it forms ions Na+ and S2-.

49.

The correct answer is Electron

Oxidation-reduction reaction or redox reaction:

A reaction in which one reactant is oxidized and another is reduced.

Oxidation:

Oxidation is a process in which either 1 or all following changes occurs:

Reduction:

Reduction is a process in which either 1 or all following changes occurs:

Oxidation and reduction process are reverse process.

50.

2Al (s) + 6 H+ (aq) --- > 2 Al3+   + 3H2 (g)

ON , 0               +1                         +3      0

Here the oxidation number of Al is increased from 0 to +3 thus it is oxidized and H is reduced by accepting electrons. Thus H+ is a reducing agent.

Oxidizing agent:

Oxidizing agent is a reactant of a reaction which causes an oxidation through accepting electron.

Reducing agent:

Reducing agent is a reactant of a reaction which causes a reduction through donating electron.

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