* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Document
History of chemistry wikipedia , lookup
Multi-state modeling of biomolecules wikipedia , lookup
California Green Chemistry Initiative wikipedia , lookup
Enantioselective synthesis wikipedia , lookup
Fine chemical wikipedia , lookup
Debye–Hückel equation wikipedia , lookup
Hydrogen-bond catalysis wikipedia , lookup
Al-Shifa pharmaceutical factory wikipedia , lookup
Relativistic quantum mechanics wikipedia , lookup
Drug discovery wikipedia , lookup
Asymmetric induction wikipedia , lookup
Chemical weapon proliferation wikipedia , lookup
Photoredox catalysis wikipedia , lookup
Electrolysis of water wikipedia , lookup
Chemical weapon wikipedia , lookup
Safety data sheet wikipedia , lookup
Spinodal decomposition wikipedia , lookup
Chemical Corps wikipedia , lookup
Chemical potential wikipedia , lookup
Double layer forces wikipedia , lookup
Chemical plant wikipedia , lookup
Chemical industry wikipedia , lookup
Equilibrium chemistry wikipedia , lookup
Hydroformylation wikipedia , lookup
Physical organic chemistry wikipedia , lookup
Photosynthetic reaction centre wikipedia , lookup
Process chemistry wikipedia , lookup
Chemical equilibrium wikipedia , lookup
George S. Hammond wikipedia , lookup
Rate equation wikipedia , lookup
Metalloprotein wikipedia , lookup
Bioorthogonal chemistry wikipedia , lookup
Chemical reaction wikipedia , lookup
Electrochemistry wikipedia , lookup
Lewis acid catalysis wikipedia , lookup
VX (nerve agent) wikipedia , lookup
Click chemistry wikipedia , lookup
Strychnine total synthesis wikipedia , lookup
Evolution of metal ions in biological systems wikipedia , lookup
Transition state theory wikipedia , lookup
Chemistry Review 8 Chemical Equations and Reactions You mix solution A with solution B in a beaker. Which of the following observations does not help you prove that a chemical reaction has occurred? A. The beaker becomes warm. B. You see gas bubble out of solution. C. Solution A, solution B, and the mixture are all yellow. D. None of the above; all help prove that a chemical reaction has occurred. In the reaction described by the word equation sodium + water sodium hydroxide + hydrogen gas A. sodium hydroxide is a product. B. sodium is a product. C. water is a reactant. D. Both (a) and (c) Which of the following indicates that a chemical equation is balanced? A. The numbers of atoms of each element are the same on both sides of the equation. B. All of the coefficients are the same. C. The numbers of molecules on each side of the equation are equal. D. The sums of the coefficients on each side of the equation are equal. From a complete and correctly written chemical equation, you can obtain the A. chemical formulas of the reactants and products. B. relative amounts of the reactants and products. C. physical states of the reactants and products. D. All of the above To balance a chemical equation, you must A. adjust the subscripts. B. adjust the number of products. C. adjust the number of reactants. D. adjust the coefficients. The formation of a solid product in a chemical reaction is represented by the symbol A. (aq). B. (g). C. (l). D. (s). What symbol indicates a reversible reaction? A. B. C. D. In the expression 3CO2, the numbers 3 and 2 are, respectively, A. a subscript and a coefficient. B. a coefficient and a subscript. C. two subscripts. D. two coefficients. What is the total number of molecules that is represented by the following chemical equation? NH4NO2 N2 + 2H2O A. 3 B. 4 C. 8 D. 16 Which equation below violates the law of conservation of mass? A. 2H2 + O2 2H2O B. KCl + Br2 KBr Cl2 C. 2Fe2O3 + 3C 4Fe + 3CO2 D. Na2CO3 + 2HCl 2NaCl + H2O + CO2 Which of the following equations represents the balanced equation for the reaction of iron and oxygen? A. 2Fe + O2 Fe2O3 B. Fe + 3O2 Fe2O3 C. 4Fe + 3O2 2Fe2O3 D. 3Fe + 3O2 2Fe2O3 Which coefficients correctly balance the formula equation below? KClO3(s) KCl(s) + O2(g) A. 1, 1, 1 B. 1, 1, 3 C. 2, 2, 3 D. 2, 1, 1 Which equation is not balanced? A. 2H2 + O2 2H2O B. 4H2 + 2O2 4H2O C. H2 + H2 + O2 H2O + H2O D. 2H2 + O2 H2O In which type of reaction do two or more compounds react to form one product? A. synthesis B. decomposition C. combustion D. single-displacement Which of the following is true regarding single-displacement reactions? A. Only one product is formed. B. There is only one reagent. C. It requires oxygen. D. One element replaces another in a compound. Which of the following is true regarding double-displacement reactions? A. Two products are formed. B. The ions of the two reactants must be exchanged. C. A precipitate may form. D. All of the above A mixture of propane and oxygen react to form carbon dioxide and water. What type of chemical reaction is this? A. synthesis B. decomposition C. double-displacement D. combustion What type of chemical reaction does the following chemical equation represent? 2HCl(aq) + Cr(s) H2(g)+ CrCl2(aq) A. composition B. single-displacement C. decomposition D. double-displacement Calcium carbonate, CaCO3, reacts to form calcium oxide, CaO, and carbon dioxide, CO2. What type of reaction is this? A. synthesis B. replacement C. combustion D. decomposition What type of chemical reaction is represented by the following word equation? iron + oxygen iron(II) oxide A. synthesis B. replacement C. combustion D. double-displacement Metal X replaces the ions of metal Y from solution, but it cannot replace the ions of metal Z from solution. The order these metals should have in the activity series (from top to bottom) is A. x, y, z B. z, x, y C. y, x, z D. z, y, x In a single-displacement reaction, an element in the activity series most likely can replace any element A. above it on the list. B. in the same group. C. below it on the list. D. in any other group. The activity series helps to predict A. the amount of product formed by a chemical reaction. B. whether or not a specific chemical reaction is possible. C. the coefficients needed to balance a chemical equation. D. the amount of energy needed to start a chemical reaction. If calcium is listed above magnesium in the activity series, and magnesium is listed above zinc, which of the following reactions is possible? A. Ca(s) + MgCl2(aq) B. Zn(s) + MgCl2(aq) C. Zn(s) + CaCl2(aq) D. Mg(s) + CaCl2(aq) Final Jeopardy You have an unknown metal, X. You conduct two experiments. The results are shown in the table below. Procedure Result X(s) + NaCl(aq) no reaction X(s + )ZnCl2(aq) reaction of metal Which of the following statements is a logical conclusion based on the experimental data? A. The unknown metal is higher on the activity series than both sodium and zinc. B. The unknown metal is higher on the activity series than sodium, but below zinc. C. The unknown metal is higher on the activity series than zinc, but below sodium. D. The unknown metal is below both sodium and zinc on the activity series.