File
... is evidently true? A) The precision is poor, but the accuracy is excellent B) The precision is good, but the accuracy cannot be evaluated from the given information. C) The accuracy would be better if a more concentrated NaOH solution were used D) All three titrations have the same amount of error E ...
... is evidently true? A) The precision is poor, but the accuracy is excellent B) The precision is good, but the accuracy cannot be evaluated from the given information. C) The accuracy would be better if a more concentrated NaOH solution were used D) All three titrations have the same amount of error E ...
synthesis reaction
... Convert between moles and mass of a substance using molar mass. Calculate amounts of reactants or products by using molar mass, mole ratios, and balanced chemical equations. ...
... Convert between moles and mass of a substance using molar mass. Calculate amounts of reactants or products by using molar mass, mole ratios, and balanced chemical equations. ...
Form A 1 Chem 130 Name______________________________
... c. 1.9 x 10-4 M min-1 d. 1.5 x 10-3 M min-1 Part I: Complete all of problems 3-8. 12 points each. 4. For each of the statements below, indicate whether the statement is CORRECT or INCORRECT and justify your choice in no more than two sentences for each item. a. As two gases mix, S is positive. CORR ...
... c. 1.9 x 10-4 M min-1 d. 1.5 x 10-3 M min-1 Part I: Complete all of problems 3-8. 12 points each. 4. For each of the statements below, indicate whether the statement is CORRECT or INCORRECT and justify your choice in no more than two sentences for each item. a. As two gases mix, S is positive. CORR ...
Chemical reactions cause chemical changes. They involve the
... To React or Not to React! Answer Key Instructions: Read the article. Answer all the questions on a separate sheet of paper. You may write on this article. Chemical reactions cause chemical changes. They involve the breaking and making of chemical bonds. All chemical reactions involve a change in sub ...
... To React or Not to React! Answer Key Instructions: Read the article. Answer all the questions on a separate sheet of paper. You may write on this article. Chemical reactions cause chemical changes. They involve the breaking and making of chemical bonds. All chemical reactions involve a change in sub ...
APEF – Equilibrium and Reaction Rate Multiple Choice Answers
... APEF – Equilibrium and Reaction Rate – Multiple Choice Questions - Answers - Page 1 of 6 ...
... APEF – Equilibrium and Reaction Rate – Multiple Choice Questions - Answers - Page 1 of 6 ...
Unit 3 Ch. 9 - Classifying Chemical Reactions
... When silver tarnishes, it combines with sulfur and forms silver sulfide (Ag2S). Silver sulfide is black. When a thin coating of silver sulfide forms on the surface of silver, it darkens the silver. The silver can be returned to its former luster by removing the silver sulfide coating from the surfac ...
... When silver tarnishes, it combines with sulfur and forms silver sulfide (Ag2S). Silver sulfide is black. When a thin coating of silver sulfide forms on the surface of silver, it darkens the silver. The silver can be returned to its former luster by removing the silver sulfide coating from the surfac ...
Chem 30A Final Exam
... 1. Draw valid Lewis structures for the simplest compounds of the second row elements (except for Li) with flourine including lone pair electrons. Indicate the valence (i.e. # of bonds), the central atom geometry, and the approximate bond angles in each case. Also indicate when there is an exception ...
... 1. Draw valid Lewis structures for the simplest compounds of the second row elements (except for Li) with flourine including lone pair electrons. Indicate the valence (i.e. # of bonds), the central atom geometry, and the approximate bond angles in each case. Also indicate when there is an exception ...
Thermodynamics (Part 2)
... -thermodynamics tells us if a reaction occurs; kinetics explains speed Nonspontaneous: do not occur at all, or require a constant supply of energy ex: electrolysis of water ...
... -thermodynamics tells us if a reaction occurs; kinetics explains speed Nonspontaneous: do not occur at all, or require a constant supply of energy ex: electrolysis of water ...
Ch. 20 study questions
... A copper-zinc voltaic cell is constructed using100 mL solutions of 1M solutions of copper sulfate and zinc sulfate with a sodium sulfate salt bridge. After some time, t, had passed at 25C, the concentration of the Zn2+ ions in the anode half cell had increased to 1.50M and the concentration of the ...
... A copper-zinc voltaic cell is constructed using100 mL solutions of 1M solutions of copper sulfate and zinc sulfate with a sodium sulfate salt bridge. After some time, t, had passed at 25C, the concentration of the Zn2+ ions in the anode half cell had increased to 1.50M and the concentration of the ...
Describing Chemical Reactions
... The equation must contain the correct formulas for the reactants and products. ...
... The equation must contain the correct formulas for the reactants and products. ...
Degrees of freedom
... Average kinetic energy of the gas molecules = 3/2 RT We have considered the motion of these molecules to be in three directions, in other words we say that the molecule has three degrees of freedom. It is therefore sensible to suppose that one-third of the total energy is associated with each degree ...
... Average kinetic energy of the gas molecules = 3/2 RT We have considered the motion of these molecules to be in three directions, in other words we say that the molecule has three degrees of freedom. It is therefore sensible to suppose that one-third of the total energy is associated with each degree ...
Solution
... Consider the reaction NH3(g) + BF3(g) → NH3BF3(s). a) Draw the Lewis Dot structure for the product of this reaction and indicate formal charges on nitrogen and boron. Explain why these two molecules tend to react. ...
... Consider the reaction NH3(g) + BF3(g) → NH3BF3(s). a) Draw the Lewis Dot structure for the product of this reaction and indicate formal charges on nitrogen and boron. Explain why these two molecules tend to react. ...
Chemistry 11 - Sardis Secondary
... - calculating the amount of excess reactant - calculating the amount of product formed in a reaction using the limiting reactant C. Percent Yield (text pgs. 365-373) - calculating the efficiency of a chemical reaction from percent yield ...
... - calculating the amount of excess reactant - calculating the amount of product formed in a reaction using the limiting reactant C. Percent Yield (text pgs. 365-373) - calculating the efficiency of a chemical reaction from percent yield ...
chem16 part2 lect1 thermodynamics
... of F2(g) to form two moles of HF(g) at 25oC and one atmosphere. (Ans. -542 kJ) ...
... of F2(g) to form two moles of HF(g) at 25oC and one atmosphere. (Ans. -542 kJ) ...
Transition state theory
Transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes.TST is used primarily to understand qualitatively how chemical reactions take place. TST has been less successful in its original goal of calculating absolute reaction rate constants because the calculation of absolute reaction rates requires precise knowledge of potential energy surfaces, but it has been successful in calculating the standard enthalpy of activation (Δ‡Hɵ), the standard entropy of activation (Δ‡Sɵ), and the standard Gibbs energy of activation (Δ‡Gɵ) for a particular reaction if its rate constant has been experimentally determined. (The ‡ notation refers to the value of interest at the transition state.)This theory was developed simultaneously in 1935 by Henry Eyring, then at Princeton University, and by Meredith Gwynne Evans and Michael Polanyi of the University of Manchester. TST is also referred to as ""activated-complex theory,"" ""absolute-rate theory,"" and ""theory of absolute reaction rates.""Before the development of TST, the Arrhenius rate law was widely used to determine energies for the reaction barrier. The Arrhenius equation derives from empirical observations and ignores any mechanistic considerations, such as whether one or more reactive intermediates are involved in the conversion of a reactant to a product. Therefore, further development was necessary to understand the two parameters associated with this law, the pre-exponential factor (A) and the activation energy (Ea). TST, which led to the Eyring equation, successfully addresses these two issues; however, 46 years elapsed between the publication of the Arrhenius rate law, in 1889, and the Eyring equation derived from TST, in 1935. During that period, many scientists and researchers contributed significantly to the development of the theory.