AC-HPAT CHEMISTRY EXAM GRADED A+
100% VERIFIED.
1. double-displacement reaction ANS >>> A double displacement reaction, also
known as a double replacement reaction or metathesis, is a type of chemical
reaction where two compounds react, and the positive ions (cation) and the
negative ions (anion) of the two reactants switch places, forming two new
compounds or products
2. Precipitate ANS >>> precipitate is an insoluble solid that emerges from a liquid
solution. The emergence of the insoluble solid from solution is called precipitation.
Often the precipitate emerges as a suspension. Precipitates can form when two
soluble salts react in solution to form one or more insoluble products.
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, 3. Energy Levels ANS >>> Energy levels (also called electron shells) are fixed
distances from the nucleus of an atom where electrons may be found. As you go
farther from the nucleus, electrons at higher energy levels have more energy.
Electrons in the outermost energy level of an atom are called valence electrons
4. Marquis Test ANS >>> The Marquis Test is commonly used for Ecstasy testing as
MDMA turns the precipitate purple black. Cobalt thiocyanate is used to test for
cocaine. The Cobalt is mixed with the questionable substance, then drowned in
hydrochloric acid, doused in chloroform, and shaken.
5. What is the relation between an atomic number and a mass number? ANS >>>
Atomic number is actually the number of protons in an atom while mass number is
the number of nucleons i. e, number of protons plus the number of neutrons.
6. Isotopes ANS >>> Isotopes refer to the nuclides of a certain element that have
different numbers of neutrons, or in other words, atomic nuclei that have the
same number of protons but different numbers of neutrons. A radioisotope is an
isotope that is unstable and therefore undergoes radioactive decay or will at
some point.
7. Chemical Synthesis ANS >>> Chemical synthesis, the construction of complex
chemical compounds from simpler ones. It is the process by which many
substances impor- tant to daily life are obtained. It is applied to all types of
chemical compounds, but most syntheses are of organic molecules.
8. Decomposition ANS >>> A decomposition reaction is a type of chemical reaction
in which a single compound breaks down into two or more elements or new
compounds. These reactions often involve an energy source such as heat, light,
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, or electricity that breaks apart the bonds of compounds
9. single-displacement reaction ANS >>> A single-displacement reaction, also
known as a single-replacement reaction, is a type of chemical reaction where an
element reacts with a compound and takes the place of another element in that
compound. This type of reaction is typically pictured like this ANS >>> Here, A
replaces B in the compound BC
10. Flame test ANS >>> flame test is an analytical procedure used in chemistry
to detect the presence of certain elements, primarily metal ions, based on each
element's
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100% VERIFIED.
1. double-displacement reaction ANS >>> A double displacement reaction, also
known as a double replacement reaction or metathesis, is a type of chemical
reaction where two compounds react, and the positive ions (cation) and the
negative ions (anion) of the two reactants switch places, forming two new
compounds or products
2. Precipitate ANS >>> precipitate is an insoluble solid that emerges from a liquid
solution. The emergence of the insoluble solid from solution is called precipitation.
Often the precipitate emerges as a suspension. Precipitates can form when two
soluble salts react in solution to form one or more insoluble products.
mailto:https://www.stuvia.com/user/techgrades 1/
21
, 3. Energy Levels ANS >>> Energy levels (also called electron shells) are fixed
distances from the nucleus of an atom where electrons may be found. As you go
farther from the nucleus, electrons at higher energy levels have more energy.
Electrons in the outermost energy level of an atom are called valence electrons
4. Marquis Test ANS >>> The Marquis Test is commonly used for Ecstasy testing as
MDMA turns the precipitate purple black. Cobalt thiocyanate is used to test for
cocaine. The Cobalt is mixed with the questionable substance, then drowned in
hydrochloric acid, doused in chloroform, and shaken.
5. What is the relation between an atomic number and a mass number? ANS >>>
Atomic number is actually the number of protons in an atom while mass number is
the number of nucleons i. e, number of protons plus the number of neutrons.
6. Isotopes ANS >>> Isotopes refer to the nuclides of a certain element that have
different numbers of neutrons, or in other words, atomic nuclei that have the
same number of protons but different numbers of neutrons. A radioisotope is an
isotope that is unstable and therefore undergoes radioactive decay or will at
some point.
7. Chemical Synthesis ANS >>> Chemical synthesis, the construction of complex
chemical compounds from simpler ones. It is the process by which many
substances impor- tant to daily life are obtained. It is applied to all types of
chemical compounds, but most syntheses are of organic molecules.
8. Decomposition ANS >>> A decomposition reaction is a type of chemical reaction
in which a single compound breaks down into two or more elements or new
compounds. These reactions often involve an energy source such as heat, light,
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, or electricity that breaks apart the bonds of compounds
9. single-displacement reaction ANS >>> A single-displacement reaction, also
known as a single-replacement reaction, is a type of chemical reaction where an
element reacts with a compound and takes the place of another element in that
compound. This type of reaction is typically pictured like this ANS >>> Here, A
replaces B in the compound BC
10. Flame test ANS >>> flame test is an analytical procedure used in chemistry
to detect the presence of certain elements, primarily metal ions, based on each
element's
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