Full answers
... The formula mass of NaF is (22.99 (Na) + 19.00 (F)) g mol-1 = 41.99 g mol-1. The mass of NaF required is thus: mass = number of moles × formula mass = (0.0068 mol) × (41.99 g mol-1) = 0.28 g Answer: 0.28 g Explain why HCl is a much stronger acid than HF. Cl is a much larger atom than F and is less e ...
... The formula mass of NaF is (22.99 (Na) + 19.00 (F)) g mol-1 = 41.99 g mol-1. The mass of NaF required is thus: mass = number of moles × formula mass = (0.0068 mol) × (41.99 g mol-1) = 0.28 g Answer: 0.28 g Explain why HCl is a much stronger acid than HF. Cl is a much larger atom than F and is less e ...
File
... 59. The ionization constant, Kb, of the base HONH2 is 1.1 x 108 . The pH of a 1.0 M aqueous soluton of HONH2 is closest to A) 4.0 B) 6.0 C) 8.0 D) 10.0 E) 14.0 60. Which of the following 0.10 M aqueous solutions has a pH less than 7 ? A) KI B) NH4NO3 C) K2CO3 D) NH3 E) Ca(OH)2 61. If 0.15 mol of K2 ...
... 59. The ionization constant, Kb, of the base HONH2 is 1.1 x 108 . The pH of a 1.0 M aqueous soluton of HONH2 is closest to A) 4.0 B) 6.0 C) 8.0 D) 10.0 E) 14.0 60. Which of the following 0.10 M aqueous solutions has a pH less than 7 ? A) KI B) NH4NO3 C) K2CO3 D) NH3 E) Ca(OH)2 61. If 0.15 mol of K2 ...
Physical Chemistry I – review guide
... • Pressure is uniform and equal to the surroundings in mechanical equilibrium • An extensive property is equal to the sum of its values for the parts of the system (eg: mass) • An intensive property does not depend on the size of the system (eg: density) • If the intensive macroscopic properties are ...
... • Pressure is uniform and equal to the surroundings in mechanical equilibrium • An extensive property is equal to the sum of its values for the parts of the system (eg: mass) • An intensive property does not depend on the size of the system (eg: density) • If the intensive macroscopic properties are ...
chm3400testfin
... 250.0 K to a final temperature Tf = 350.0 K. The process is carried out reversibly at a constant pressure p = 0.500 bar. For the conditions of the problem you may assume that chlorine gas behaves ideally, and that the value for the constant pressure molar heat capacity is independent of temperature. ...
... 250.0 K to a final temperature Tf = 350.0 K. The process is carried out reversibly at a constant pressure p = 0.500 bar. For the conditions of the problem you may assume that chlorine gas behaves ideally, and that the value for the constant pressure molar heat capacity is independent of temperature. ...
Word - The University of British Columbia
... processes. At the end of the semester, students are expected to: ...
... processes. At the end of the semester, students are expected to: ...
Unit 3
... • Reversible reactions reach a state of dynamic equilibrium • The rates of forward and reverse reactions are equal. • At equilibrium, the concentrations of reactants and products remain constant, although not necessarily equal. ...
... • Reversible reactions reach a state of dynamic equilibrium • The rates of forward and reverse reactions are equal. • At equilibrium, the concentrations of reactants and products remain constant, although not necessarily equal. ...
Name________________ Hour____ Chapter 11 Review 1. Name
... 2 atoms of solid aluminum react with 6 molecules of liquid water to produce 3 molecules of hydrogen gas and 2 formula units of solid aluminum hydroxide. 4. Write in symbols: 2 formula units of solid lead (IV) oxide decomposes in the presence of heat to produce 2 formula units of solid lead (II) oxid ...
... 2 atoms of solid aluminum react with 6 molecules of liquid water to produce 3 molecules of hydrogen gas and 2 formula units of solid aluminum hydroxide. 4. Write in symbols: 2 formula units of solid lead (IV) oxide decomposes in the presence of heat to produce 2 formula units of solid lead (II) oxid ...
Ch. 7 & 8 Notes (Chemical Reactions) teacher
... Review: Reactants are on the ______ left side of the arrow, and the right yields products are on the __________ side. The arrow means “________”, or “reacts to produce” when read aloud. ...
... Review: Reactants are on the ______ left side of the arrow, and the right yields products are on the __________ side. The arrow means “________”, or “reacts to produce” when read aloud. ...
Chapter 11 Review sheet Name
... symbol in the equation. A chemical change in which a free element replaces and releases another element in a compound is called a(n) (10) reaction. A chemical change in which there is an exchange of ions between two compounds is called a(n) ...
... symbol in the equation. A chemical change in which a free element replaces and releases another element in a compound is called a(n) (10) reaction. A chemical change in which there is an exchange of ions between two compounds is called a(n) ...
Snc2d Chapter 5 Practice Test
... b) In the diagram above, the Roman group number of P shows: c) The period number of P shows: d) Show a Bohr diagram above of P forming an ion, indicating beside your diagram the number of electrons gained or lost. Include the symbol with net charge and the name of the ion formed. e) With regard to i ...
... b) In the diagram above, the Roman group number of P shows: c) The period number of P shows: d) Show a Bohr diagram above of P forming an ion, indicating beside your diagram the number of electrons gained or lost. Include the symbol with net charge and the name of the ion formed. e) With regard to i ...
Study Sheet
... Know the two big driving forces of the universe: tend toward minimum Enthalpy (H) … potential energy tend toward maximum Entropy (S) … randomness… disorder… (Note: Our book does not cover entropy until chapter 18) ...
... Know the two big driving forces of the universe: tend toward minimum Enthalpy (H) … potential energy tend toward maximum Entropy (S) … randomness… disorder… (Note: Our book does not cover entropy until chapter 18) ...
Final Exam review semester 1
... 1. Ninety-nine percent of all the matter that can be observed in the universe exists as 2. Hydrochloric acid, HCl, is added to solid NaOH. After the reaction is complete, NaCl dissolved in water remains. What are the products of this chemical reaction? ____ ...
... 1. Ninety-nine percent of all the matter that can be observed in the universe exists as 2. Hydrochloric acid, HCl, is added to solid NaOH. After the reaction is complete, NaCl dissolved in water remains. What are the products of this chemical reaction? ____ ...
Analytical Chemistry
... Equilibrium exists between the weak acid, water, H:O', and the anion of the weak acid. The equilibrium lies to the left hand side ofthe equation, indicating that not much H3O* is being produced. The fact that very little H3O* is being produced is the ...
... Equilibrium exists between the weak acid, water, H:O', and the anion of the weak acid. The equilibrium lies to the left hand side ofthe equation, indicating that not much H3O* is being produced. The fact that very little H3O* is being produced is the ...
Name: Northwest Vista College Chem 1311
... 1. Using complete sentences, compare and contrast Reaction A and Reaction B in terms of the following parameters: a. Relative energy content of reactants and products b. amount of energy needed to make the reaction happen (Energy of activation) c. net amount of energy released or absorbed (exo or en ...
... 1. Using complete sentences, compare and contrast Reaction A and Reaction B in terms of the following parameters: a. Relative energy content of reactants and products b. amount of energy needed to make the reaction happen (Energy of activation) c. net amount of energy released or absorbed (exo or en ...
Chapter 8 Section 1 Describing Chemical Reactions
... Sample Problem E Solution 1. Identify the reactants. Magnesium will attempt to displace lead from lead(II) nitrate. 2. Check the activity series. Magnesium is more active than lead and displaces it. 3. Write the balanced equation. Mg + Pb(NO3)2 Pb + Mg(NO3)2 Double-Displacement Reactions • In a do ...
... Sample Problem E Solution 1. Identify the reactants. Magnesium will attempt to displace lead from lead(II) nitrate. 2. Check the activity series. Magnesium is more active than lead and displaces it. 3. Write the balanced equation. Mg + Pb(NO3)2 Pb + Mg(NO3)2 Double-Displacement Reactions • In a do ...
Chemical equilibrium
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time. Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s). Such a state is known as dynamic equilibrium.