WorksheetsGenCHem Chapter 1-5
Total questions: 92
Worksheet time: 2hrs 32mins
Filters solutions or removes solvent under reduced pressure.
(a)
Container to hold liquid or solid samples
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Guides liquid or powder into a small opening
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Two parts of a measurement
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Used to handle chemical. Convenient container for heating small amounts of liquids or solids.
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It is referred to as the basic quantities. Quantities which
are measured by the direct method.
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Hold round bottom flasks, beakers and other glass containers snuggly to ensure against breakage.
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Measures the volume of liquid.
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Essential item used in the distillation of liquid mixtures to separate the mixture into its component parts, or fractions, based on the differences in volatilities.
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is a form of shorthand used to write an extremely large and exceedingly small numbers
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Three Measurement System
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-Cools vapors and condensing them back to liquid droplets that flow down the condenser into the receiver flask.
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are zeros between non-zero digits.
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Contain liquids and for mixing, heating, cooling, incubation, filtration, storage, and other liquid-handling processes.
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These involve numbers that were not obtained using measuring devices but were determined by counting: 10 experiments, 3 apples, 8 molecules. They can be assumed to have an infinite number of significant figures.
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Rinses various pieces of laboratory glassware, such as test tubes and round bottom flasks.
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A surface to evaporate a liquid or heat solids. Hold solids while being weighed Cover for a beaker
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are zeros at the right end of the number. They are significant only if the number contains a decimal point.
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System of Units SI is formally called
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are zeros that precede zero digits. These do not count as significance figures. The number 0.0025, the three zeros simply indicate the position of the decimal point. This number has only two (2) significant figures
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7 physical quantity
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These always count as significant figures.1458 has four (4) non-zero digits, all of which significant figures.
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are those that can be developed in terms of the fundamental dimensions/units, result of the combination of fundamental quantities after a set of operations.
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is a substance that cannot be separated into simpler substances by chemical means.
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is a combination of two or more substances in which the substances retain their distinct identities.
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Are chemical changes often irreversible
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Any characteristic that can be determined without changing the substance’s chemical identity.
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is fundamental to the sciences; to engineering, construction, and other technical fields; and to almost all everyday activities.
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anything that occupies space and has mass.
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can be classified as substance, mixtures, elements and compounds
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Any characteristic of matter that does not depend on the amount of the substance present.
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is a sample of matter whose physical and chemical properties are the same throughout the sample because the matter has a constant composition
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study of matter and the changes it undergoes.
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cause a substance to change into an entirely new substance with a new chemical formula.
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A reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.
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is composed of atoms of two or more elements chemically united in fixed proportions.
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: Any characteristic that can be determined only by changing a substance’s molecular structure
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: Any characteristic of matter that depends on the amount of matter being measured.
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only change the appearance of a substance, not its chemical composition.
(a)
Are physical changes are reversible
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reaction is a process in which a substance (or substances) is changed into one or more new substances.
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A reaction in which two or more reactants combine to form a single product is known as
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A chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution.
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can be classified as either extensive or intensive and as either physical or chemical.
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reaction of elements and compounds with oxygen.
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All chemical reactions exhibits the two fundamental laws
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is defined as the capacity to do work.
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A chemical reaction in which ions gets exchanged between two reactants which form a new compound is called
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- the specific part of the universe that is of interest to us
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is an integral part of chemistry that involves the relationship between product and reactants in a chemical reaction and other words means the measurement of elements
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the rest of the universe outside the system.
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Type of system that allows transfer of both matter and energy.
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type of system that allows exchange of energy only; consists of a fixed amount of mass while its volume does not have to be fixed.
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type of system that allows neither transfer of matter nor energy.
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is the measurement of heat changes.
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is a thermodynamic quantity equivalent to the total
heat content of a system.
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is the transfer of thermal energy between two bodies that are at different temperatures
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is the amount of heat required to raise the temperature of an object or substance one degree.
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process that results to the release of energy in the form of heat to the surroundings.
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is used to describe the behavior of a system in terms of thermodynamic properties such as temperature, pressure, entropy, and heat capacity.
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process that results to the absorption of energy in the form of heat from the surroundings.
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required temp to increase a gram of substance by 1 degree C.
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is the study of heat change in chemical reactions.
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form of energy transferred from one body to another by virtue of a temperature difference
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Heat of combustion is usually measured by placing a known mass of a compound in a
steel container
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What is the Boltzmann Constant
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The branch which deals with the movement of energy from one form to the other and the relation between heat and temperature with energy and work done
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deals with the interconversion of heat
and other forms of energy.
(a)
is the absolute entropy of a substance at 1 atm and
25°C.
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states that
energy can be converted from one form to another,
but it cannot be created or destroyed.
(a)
is equal to the enthalpy of the system minus the product of the temperature and entropy.
(a)
is defined as
the entropy of the universe increases in a spontaneous
process and remains unchanged in an equilibrium
process.
(a)
states that entropy of a perfect
crystalline substance is zero at the absolute zero of temperature.
(a)
are redox reactions in which the
energy released by a spontaneous reaction is converted to electricity
or in which electricity is used to drive a nonspontaneous chemical
reaction.
(a)
is the strongest oxidizing agent.
(a)
converts chemical energy into electrical energy.
(a)
is either the oxidation or reduction reaction
component of a redox reaction.
(a)
Known as the anode
(a)
It is possible to construct a cell that does work on
a chemical system by driving an electric current
through the system.
(a)
are driven by a
spontaneous chemical reaction that produces an
electric current through an outside circuit.
(a)
The substance (atom, ion, and molecule) that gains
electrons and is thereby reduced to a low valency state is
called
(a)
fre, the anode is positve and cathode is the negative electrode. The reaction at
the anode is oxidation and that at the cathode is reduction.
(a)
Known as the Cathode
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states that entropy of a perfect
crystalline substance is zero at the absolute zero of temperature.
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E°cell is measured in
(a)
Reaction Method in which we add OH- ions to both sides to neutralize H+
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converts electrical energy into chemical energy.
(a)
Here, the redox reaction is spontaneous and is responsible for the production of
lectical energy
(a)
Here the anode is negative and cathode is the positive electrode. The reaction at
the anode is oxidation and that at the cathode is reduction,
(a)
is the electromotive force (also called cell voltage or cell
potential) between two half-cells.
(a)
The redox reactions nt spontaneous and electrical energy has tobe supplied to
initiate the reaction.
(a)
The substance that loses electrons and is thereby oxidised
to a higher valency state is called
(a)
