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WorksheetsFIVIZZ: WEEK 3 - CHEMISTRY 3
Total questions: 15
Worksheet time: 49mins
By reversing the reactants and products for an equilibrium reaction, the equilibrium constant becomes
(a)
Which of the following answers is NOT the characteristic of equilibrium?
dynamic
concentration of reactants and products does not remain constant at equilibrium
rate of forward reaction = rate of reverse reaction
requires a closed system
According to Le Chatelier's principle:
If a chemical system at equilibrium experiences a change in temperature, pressure or concentration of a reactant or product, the position of the equilibrium __________
shifts to the right
shifts to the left
shifts to the direction that induces changes
shifts to the direction that reduces changes
When the concentration of one or more of the products is increased,
(hint: choose any 3)
the temperature increases
the system is no longer in equilibrium
the position of equilibrium moves to the left
more reactants are formed until equilibrium is restored
If we add more ethanol, the position of equilibrium shifts to the (right / left)
(a)
If we add more water, according to Le Chatelier's principle, some of the water must be ...(a)... to ...(b)... the concentration of added water
(*choose 1 answer to represent a, and 1 answer to represent b)
added-(a)
removed-(a)
increase-(b)
reduce(b)
no unit
mol dm-3
mol-1dm3
1. All chemical substance is in aqueous state
2. Answer must be typed in 3 significant figures, and type only the values (omit the unit)*
3. 15 mins is allocated for this particular question so don’t rush :)
(a)
1. Answer in standard form , i.e. 6.5E8, with no spacing
2. Omit the unit
3. 15 mins is allocated, also, for this particular question XD
(a)
Catalyst
provide alternative reaction pathway with higher activation energy
increase reaction rates of both forward and reverse reactions
participate in the reaction
affects the equilibrium position and equilibrium constant
Based on the equation above and The Bronsted-Lowry theory, hydrochloric acid is an acid because it
(a)
Lewis acid is
an atom, ion, or molecule that accepts a pair of electrons to form a coordinate covalent bond
an electrophile
a proton acceptor
Choose strong bases only
NH3
Ca(OH)2
HCO3-
NaOH
What is the pH of a 0.05 M solution of Potassium Hydroxide?
(a)
Calculate the pH of 0.01 mol dm-3 HCl (aq)
(a)
