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WorksheetsBasic Chemistry Final Exam
Total questions: 28
Worksheet time: 28mins
A homogeneous mixture of two or more substances is called as
solution
solute
solvent
The substance present in a smaller amount is called as
solution
solute
solvent
The substance present in a larger amount is called as
solution
solute
solvent
Picture (a) is depicted
nonelectrolyte
very weak electrolyte
weak electrolyte
strong electrolyte
very strong electrolyte
Picture (b) is depicted
nonelectrolyte
very weak electrolyte
weak electrolyte
strong electrolyte
very strong electrolyte
Picture (c) is depicted
nonelectrolyte
very weak electrolyte
weak electrolyte
strong electrolyte
very strong electrolyte
How many grams of potassium dichromate (K2Cr2O7 ) are required to prepare a 125 mL solution whose concentration is 1,83 M? The molar mass of K2Cr2O7 is 294,2 g.
(a)
All forms of energy can be converted (at least in principle) from one form to another. It is stated as the law of
(a)
This picture is depicted (a) reaction
Classify each of the following as an open system, a closed system, or an isolated system: Soup kept in a closed thermo flask
open system
closed system
isolated system
Classify each of the following as an open system, a closed system, or an isolated system: A student reading in her dorm room
open system
closed system
isolated system
Classify each of the following as an open system, a closed system, or an isolated system: Air inside a tennis ball
open system
closed system
isolated system
A 466-g sample of water is heated from 8.50 °C to 74.60 °C. Calculate the heat absorbed (in kilojoules) by the water (specific heat of water 4.184 J/g.°C)
(a)
These are the requirements for reactants to make products
molecules must collide
molecules have to aligned correctly
molecules have to have enough E
molecules have to break bonds
Minimum energy needed for a reaction to take place upon proper collision of reactants is called as
(a)
A temporary state where bonds are reforming is called as
(a)
These are the factors affecting rate of reaction
nature of the reactants
concentration
surface area
pressure
the presence of catalyst
Which one has more surface area
rock sugar
granulated sugar
Explain clearly the mechanism of catalyst in affecting reaction rates
State the effect of each on the rate of reaction as
(I) increases, (D) decreases, or (N) no change: Removing some of the reactants
I
D
N
State the effect of each on the rate of reaction as
(I) increases, (D) decreases, or (N) no change: Placing the reaction flask in ice
I
D
N
Explain clearly the Le Chatelier's principle in oxygen transport in blood
Acid is any chemical that increases the concentration of hydrogen ions (H+ )in solution, whereas base is any chemical that increases the hydroxide ions (OH-) concentration in solution. This definition was made by
Arrhenius
Bronsted-Lowry
Lewis
Acid is a molecule or ion that is a hydrogen ion donor, whereas base is a hydrogen ion acceptor. This definition was made by
Arrhenius
Bronsted-Lowry
Lewis
Acid is an electron pair acceptor, whereas base is an electron pair donor. This definition was made by
Arrhenius
Bronsted-Lowry
Lewis
What is the pOH of a solution at 25 °C where [H+ ] = 1 x 10-4?
(a)
Which one is the conjugate acid and base pair?
Which one is the conjugate base and acid pair?
