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Quiz 1a 1b & 2
| Question | Answer |
|---|---|
| The smalles possible unit of a covalent compound is a | molecule |
| in the reaction a + b -> ab, which of the following will not increase the rate? | dectreasing the temperature |
| which of the following ph's corresponds to a weakly acidic solution | 5.3 |
| a chemical bond formed when a pair of electrons is unequally shared is a ______________ bond | polar covalent |
| the h3o ion is called the___________ ion | hydronium |
| a bronsted lowry acid is a substance which | donates protons to other substances |
| for the following reaction, increasing the pressure will cause the equilibrium_________ (2SO2 + O2 <-> 2SO3 + heat) | shift to the right, towards products |
| one characteristic of a cation is | it has more protons than electrons |
| when acids and bases react the product other than water is a | salt |
| which of the following statements is correct | in an acidic solution, H3O > 10-7; OH < 10-7 |
| the term which best describes the crystalline substance that results when a large number of metal atoms transfer electrons to a large number of non metal atoms is | ionic solid |
| a process or reaction which takes in heat from the surroundings is said to be | endothermic |
| a chemical bond formed when a pair of electrons is equally shared is a _______________ bond | nonpolar covalent |
| when an atom donates an electron, that electron | is acquired by another atom which becomes an anion |
| an atom with 3 valence electron will most likely | lose three electrons |
| which statement is correct for pure water | contains equal amounts of hydroxide and hydronium ions |
| main group elements that are non metals usually ________ one or more electrons to form ___________ which have a ______ charge | gain, anions, negative |
| at 25C the value of Kw is | 1.00 x 10-14 |
| acetic acid is a weak acid in water because it is | only slightly dissociated into ions |
| main group elements that are metals usually _______ one or more electrons to form ________ which have a ________ charge | lose, cations, positive |
| a process or reaction which releases heat to the surroundings is said to be | exothermic |
| a small negatively charged particle formed when an atom gains one or more electrons is called a | anion |
| which change to this reaction system would cause the equilibrium to shift to the right (N2 + 3H2 <-> 2NH3 + heat) | lowering the temperature |
| if the H+ of a water sample is 1 x 10-4 M, the pH of the sample is _______ and the sample is _______ | 4, acidic |
| when a reaction system is at equilibrium | the rates of the reaction in the forward and reverse directions are exactly equal |
| if the H+ of a water sample is 1 x 10-4 M, the OH- is | 1 x10-10 M |
| the function of a catalyst in a reacton system is to | increase the rate of the reaction |
Created by:
Katiejean
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