AC-HPAT Chemistry QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) / ALREADY GRADED A+

AC-HPAT Chemistry .m




1. double-displace- A double displacement reaction, also known as a
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ment reaction
.m .m doublereplacement reaction or metathesis, is a type of
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chemicalreaction where two compounds react, and the
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positive ions (cation) and the negative ions (anion) of the
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two reactants switch places, forming two new compounds
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or products .m .m




2. Precipitate precipitate is an insoluble solid that emerges from a .m .m .m .m .m .m .m .m




liquidsolution. The emergence of the insoluble solid from
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solu-tion is called precipitation. Often the precipitate
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emerges as a suspension. Precipitates can form when two
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solublesalts react in solution to form one or more insoluble
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prod-ucts.
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3. Energy Levels .m Energy levels (also called electron shells) are fixed dis- .m .m .m .m .m .m .m .m




tances from the nucleus of an atom where electrons
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maybe found. As you go farther from the nucleus,
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electrons at higher energy levels have more energy.
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Electrons in the outermost energy level of an atom are
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called valenceelectrons
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4. Marquis Test .m The Marquis Test is commonly used for Ecstasy test-
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ing as MDMA turns the precipitate purple black. Cobalt
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thiocyanate is used to test for cocaine. The Cobalt is
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mixed with the questionable substance, then drowned
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inhydrochloric acid, doused in chloroform, and shaken.
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5. What is the rela- Atomic number is actually the number of protons in an
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tion between an atom while mass number is the number of nucleons
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atomic number i. e,number of protons plus the number of neutrons.
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and a mass num-
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ber?
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6. Isotopes Isotopes refer to the nuclides of a certain element that .m .m .m .m .m .m .m .m .m




have different numbers of neutrons, or in other words,
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atomic nuclei that have the same number of protons but
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different numbers of neutrons.A radioisotopeis an isotopeth
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at is unstable and therefore undergoes radioactive de- cay
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or will at some point.
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, AC-HPAT Chemistry .m




7. Chemical Syn- .m Chemical synthesis, the construction of complex chemicalco .m .m .m .m .m .m .m




thesis
.m mpounds from simpler ones. It is the process by .m .m .m .m .m .m .m .m




which many substances important to daily life are
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obtained. It
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is applied to all types of chemical compounds, but
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mostsyntheses are of organic molecules.
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8. Decomposition A decomposition reaction is a type of chemical reaction in
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which a single compound breaks down into two or more
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elements or new compounds.These reactions ofteninvolve
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an energy source such as heat, light, or electricitythat
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breaks apart the bonds of compounds
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9. single-displace- Asingle-displacement reaction, alsoknown as a single-re-
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ment reaction
.m .m placement reaction, is a type of chemical reaction where
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an element reacts with a compound and takes the place
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of anotherelement in that compound.This type of reactionis
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typically pictured like this: Here, A replaces B in the
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compound BC .m .m




10. Flame test .m flame test is an analytical procedure used in chemistry
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todetect the presence of certain elements, primarily metal
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ions, based on each element's characteristic emission
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spectrum.The color of flames in general also depends
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ontemperature; see flame color.
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11. Precipitation re- A precipitation reaction refers to the formation of an in-
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action
.m soluble salt when two solutions containing soluble salts
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are combined.The insoluble salt that falls out of solutionis
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known as the precipitate, hence the reaction's name.
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Precipitation reactions can help determine the
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presenceof various ions in solution.
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12. organic com- .m An organic compound is a substance that is added to a
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pounds
.m product, like food, to improve somequalitiessuchas taste,smel
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colour and texture. These substances can be bothpositive
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and negative for human health.
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13. Synthetic materi- Synthetic materials which are by-products of
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als
.m petroleumare non-biodegradable, synthetic products
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, AC-HPAT Chemistry
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.m take a long
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