Metals
compounds formed from metal and nonmetal are ____
Ionic Compounds
Compounds formed from nonmetals are_______
Molecular compounds
Suppose that a metal oxide of formula M2O3 were soluble in water. What would be the major product or products of dissolving the substance in water?
(a) MH3(aq) + O2(g)
(b) M(s) + H2(g) + O2(g)
(c) M3+ (aq) + H2O2(aq)
(d) M(OH)2(aq)
(e) M(OH)3(aq)
(e) M(OH)3(aq)
A compound ACl2 (A is an element ) has a boiling point of -121C. Would you expect the compound to be molecular or ionic? If you were told that A is either magnesium or sulphur, which do you think is the more likely choice
Molecular, it has low boiling point.
A is sulphur
(a) Would you expect scandium oxide to be a solid, liquid, or gas at room temperature?
Solid, because it is ionic compound
Consider the following oxides: SO2, Y2O3, MgO, Cl2O, N2O5.
How many are expected to form acidic solutions in water?
(a) 1 (b) 2 (c) 3 (d) 4 (e) 5
3
Write the balanced chemical equation for the reaction of scandium oxide (Sc2O3) with nitric acid (HNO3)
Sc2O3(s) + 6HNO3(aq)=> 2Sc(NO3)3(aq) + 3H2O(l)
Write a balanced chemical equation for the reaction of solid tetraphosphorus hexoxide with water.
P406 + 6H2O ==> 4H3PO3
Write the balanced chemical equation for the reaction between copper(II) oxide (CuO)and sulfuric acid (H2SO4).
CuO + H2SO4===> CuSO4 +H2O
Write a balanced chemical equation for the reaction of solid selenium dioxide, SeO2(s), with aqueous sodium hydroxide (NaOH).
SeO2(s) + 2 NaOH(aq) ==> Na2SeO3(aq) + H2O(l)