Questions
Explanations
46 Given the equation representing a reaction at equilibrium:
If an acid is defined as an H+ donor, what is the acid in the forward reaction?
(1) OH-(aq) (3) NH3(g)
(2) H2O(ℓ) (4) NH4+(aq)
Acids NH4+ and H2O (have an extra H)
forward...goes right
47 Compared to a solution with a pH value of 7, a solution with a thousand times greater hydronium ion concentration has a pH value of
(1) 10 (3) 3
(2) 7 (4) 4
pH changes by 3
Hydronium is the acid component
Acids lower pH
7-3=4
48 Which Lewis electron-dot diagram represents the bonding in potassium iodide?
49 The table below shows properties of two compounds at standard pressure.
Which statement classifies the two compounds?
(1) Both compounds are ionic.
(2) Both compounds are molecular.
(3) Compound 1 is ionic, and compound 2 is molecular.
(4) Compound 1 is molecular, and compound 2 is ionic.
conducts in water or melted...ionic
low MP BP is covalent ..aka molecular
50 Given two balanced equations, each representing a reaction:
Which statement compares the energy terms in these two equations?
(1) Equation 1 shows 2.2 x 105 times more energy being absorbed.
(2) Equation 2 shows 2.2 x 105 times more energy being absorbed.
(3) Equation 1 shows 2.2 x 105 times more energy being released.
(4) Equation 2 shows 2.2 x 105 times more energy being released.
both exothermic...released