e c n i
... Beginning materials are reactants Ending materials are products Example of Chemical reaction: Reactant + Reactant Product + Product ...
... Beginning materials are reactants Ending materials are products Example of Chemical reaction: Reactant + Reactant Product + Product ...
FINAL EXAM Spring 2012
... 10) Determine the pH of the following solution. Initial concentrations are given. [HF] = 1.296 M, [HCl] = 1.045 M, Ka for HF is 6.6 × 10-4 A) -0.019 B) 0.60 C) 1.3 D) 3.1 E) 3.2 11) When 0.10 mol of solid silver nitrate is added to 1.0 L of a clear, saturated solution of Ag2CrO4 (Ksp = 2.4 x 10-12), ...
... 10) Determine the pH of the following solution. Initial concentrations are given. [HF] = 1.296 M, [HCl] = 1.045 M, Ka for HF is 6.6 × 10-4 A) -0.019 B) 0.60 C) 1.3 D) 3.1 E) 3.2 11) When 0.10 mol of solid silver nitrate is added to 1.0 L of a clear, saturated solution of Ag2CrO4 (Ksp = 2.4 x 10-12), ...
2010 Chemistry Written examination 2
... answers will not be given full marks. • show all working in your answers to numerical questions. No marks will be given for an incorrect answer unless it is accompanied by details of the working. • make sure chemical equations are balanced and that the formulas for individual substances include an i ...
... answers will not be given full marks. • show all working in your answers to numerical questions. No marks will be given for an incorrect answer unless it is accompanied by details of the working. • make sure chemical equations are balanced and that the formulas for individual substances include an i ...
2008 local exam - American Chemical Society
... (A) The initial precipitate will contain CaF2 only. (B) The initial precipitate will contain MgF2 only. (C) The initial precipitate will contain both CaF2 and MgF2 with more CaF2. (D) The initial precipitate will contain both CaF2 and MgF2 with more MgF2. 37. Which range includes the average oxidati ...
... (A) The initial precipitate will contain CaF2 only. (B) The initial precipitate will contain MgF2 only. (C) The initial precipitate will contain both CaF2 and MgF2 with more CaF2. (D) The initial precipitate will contain both CaF2 and MgF2 with more MgF2. 37. Which range includes the average oxidati ...
Physical Science
... Step 4: apply a coefficient to a molecule to balance the next off balanced atom (in this case, the oxygens are not yet balanced. We can add a coefficient of 2 in front of the reactant oxygen to correct this) Step 5: Recount Step 6: Continue doing this until all atoms are balanced ...
... Step 4: apply a coefficient to a molecule to balance the next off balanced atom (in this case, the oxygens are not yet balanced. We can add a coefficient of 2 in front of the reactant oxygen to correct this) Step 5: Recount Step 6: Continue doing this until all atoms are balanced ...
Gas and Thermo Notes
... In summary, some equations we have talked about are: ∆E = q + w ∆E = q - P∆V When we look at heat transfer, we use a process known as calorimetry, in which we transfer heat in a closed container, known as a calorimeter. The heat transferred is normally generated by a chemical reaction. We will talk ...
... In summary, some equations we have talked about are: ∆E = q + w ∆E = q - P∆V When we look at heat transfer, we use a process known as calorimetry, in which we transfer heat in a closed container, known as a calorimeter. The heat transferred is normally generated by a chemical reaction. We will talk ...
Class XI Chemistry Practics Paper
... Q2 Why 4s orbital is filled earlier to 3d orbital? Q3.Locate the position of element with atomic number 33. Q4. Define Charles law. Q5.What is the entropy change when a liquid vaporizes? Q6.What is the conjugate acid of NH3? Q7.Which out of the two- lithium or sodium forms nitrides? Q8.What effect d ...
... Q2 Why 4s orbital is filled earlier to 3d orbital? Q3.Locate the position of element with atomic number 33. Q4. Define Charles law. Q5.What is the entropy change when a liquid vaporizes? Q6.What is the conjugate acid of NH3? Q7.Which out of the two- lithium or sodium forms nitrides? Q8.What effect d ...
Thermochemistry 2 Matching Match each item with the correct
... Matching Match each item with the correct statement below. a. heat of reaction d. heat of fusion b. heat of formation e. heat of solution c. Hess's law of heat summation ____ ...
... Matching Match each item with the correct statement below. a. heat of reaction d. heat of fusion b. heat of formation e. heat of solution c. Hess's law of heat summation ____ ...
Document
... of the system, regardless of how that condition was achieved. energy, pressure, volume, temperature ...
... of the system, regardless of how that condition was achieved. energy, pressure, volume, temperature ...
Scientific Measurement
... A real gas will act most ideally under the conditions of low pressure and high temperature. (PLIGHT) ...
... A real gas will act most ideally under the conditions of low pressure and high temperature. (PLIGHT) ...
Activities From Freezing-Point Depression Data1,2 Purpose
... reached, whereupon the temperature is recorded and a sample is withdrawn quickly with a 10-ml pipette; the tip of the pipette should be held near the bottom of the flask to avoid getting pieces of ice. The pipette is used here only as a matter of convenience, as the sample volume need not be accurat ...
... reached, whereupon the temperature is recorded and a sample is withdrawn quickly with a 10-ml pipette; the tip of the pipette should be held near the bottom of the flask to avoid getting pieces of ice. The pipette is used here only as a matter of convenience, as the sample volume need not be accurat ...
pdfCfE Higher - Unit 3 - Pupil Booklet 2 MB
... very much higher capital cost before any production can occur ...
... very much higher capital cost before any production can occur ...
Making Connections - SCH4U1-CCVI
... disorder increases, since ____________ The following increases entropy: 1. The volume of a gas increases 2. The temperature of the system increases 3. Physical state solid to liquid to gas 4. Increase in the number of moles produced 5. Breaking complex molecules into smaller ones 3rd Law of Thermo ...
... disorder increases, since ____________ The following increases entropy: 1. The volume of a gas increases 2. The temperature of the system increases 3. Physical state solid to liquid to gas 4. Increase in the number of moles produced 5. Breaking complex molecules into smaller ones 3rd Law of Thermo ...
Chemistry 116: General Chemistry
... C. Protons and alpha particles have smaller cross-sections than neutrons and are therefore less likely to collide with the nucleus. D. Protons and alpha particles, being positively charged, are repelled by the nucleus. E. Protons and alpha particles are more massive than neutrons and therefore more ...
... C. Protons and alpha particles have smaller cross-sections than neutrons and are therefore less likely to collide with the nucleus. D. Protons and alpha particles, being positively charged, are repelled by the nucleus. E. Protons and alpha particles are more massive than neutrons and therefore more ...
Bonding Nomenclature Notes
... Single Covalent Bond -two atoms share 1 pair of electrons Double Covalent Bond -two atoms share 2 pair of electrons Triple Covalent Bond -two atoms share 3 pair of electrons ...
... Single Covalent Bond -two atoms share 1 pair of electrons Double Covalent Bond -two atoms share 2 pair of electrons Triple Covalent Bond -two atoms share 3 pair of electrons ...
Practice Exam-1A Fall 2016
... (e) CH3COOH, carbonic acid Hint: Follow the rules of naming the compounds. Be able to differentiate the rules between ionic and molecular compounds. 14. The atomic masses of 10B and 11B are 10.0129 amu (natural abundance 19.78% = 0.1978) and 11.0093 amu (natural abundance 80.22% = 0.8022), respectiv ...
... (e) CH3COOH, carbonic acid Hint: Follow the rules of naming the compounds. Be able to differentiate the rules between ionic and molecular compounds. 14. The atomic masses of 10B and 11B are 10.0129 amu (natural abundance 19.78% = 0.1978) and 11.0093 amu (natural abundance 80.22% = 0.8022), respectiv ...
GENERAL CHEMISTRY REVIEW
... STRONG BASES are quantitatively converted into hydroxide ion in aqueous solution. NaOH, KOH, Ca(OH)2 and Mg(OH)2 are examples of strong bases, although the latter two have limited solubility in water. WEAK BASES partially react with water to produce hydroxide ions. NH3(aq) + H2O(l) ========== NH4+(a ...
... STRONG BASES are quantitatively converted into hydroxide ion in aqueous solution. NaOH, KOH, Ca(OH)2 and Mg(OH)2 are examples of strong bases, although the latter two have limited solubility in water. WEAK BASES partially react with water to produce hydroxide ions. NH3(aq) + H2O(l) ========== NH4+(a ...
Chemistry of Cars unit_7_chemistry_of_cars
... Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 242 ...
... Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 242 ...
Slide 1
... EXAMPLE: If the empirical formula is CH2O and the molecular mass is 90 g/mole, what is the molecular formula. WE KNOW THE MOLECULAR FORMULA IS SOME WHOLE NUMBER MULTIPLE OF THE EMPIRICAL FORMULA, SO CALCULATE THE EMPIRICAL MASS 1C + 2H + 1O = 12 + 2 + 16 = 30 DIVIDE 90 BY 30 = 90/30 = 3, SO MOLECULA ...
... EXAMPLE: If the empirical formula is CH2O and the molecular mass is 90 g/mole, what is the molecular formula. WE KNOW THE MOLECULAR FORMULA IS SOME WHOLE NUMBER MULTIPLE OF THE EMPIRICAL FORMULA, SO CALCULATE THE EMPIRICAL MASS 1C + 2H + 1O = 12 + 2 + 16 = 30 DIVIDE 90 BY 30 = 90/30 = 3, SO MOLECULA ...
File
... Addition of starch to a solution that contains iodine or triiodide ion forms a reversible blue complex. The disappearance of this blue coloured complex is a much more sensitive method of determining the end point. However, if the starch is added to a solution which contains a great deal of iodine, t ...
... Addition of starch to a solution that contains iodine or triiodide ion forms a reversible blue complex. The disappearance of this blue coloured complex is a much more sensitive method of determining the end point. However, if the starch is added to a solution which contains a great deal of iodine, t ...
7.2 Acids and Bases
... Acids Reacts with metals and carbonates Conducts electricity Turns blue litmus paper red Tastes sour pH < 7 Neutralizes bases ...
... Acids Reacts with metals and carbonates Conducts electricity Turns blue litmus paper red Tastes sour pH < 7 Neutralizes bases ...
ELEMENTS AND ATOMIC MASSES INTRODUCTION An element is
... ELEMENTS AND ATOMIC MASSES INTRODUCTION An element is a fundamental substance that cannot be broken down by chemical means into simpler substances. Elements are the building blocks of all matter. Currently 106 different elements are known. Of these only 88 are found naturally. Some of the other elem ...
... ELEMENTS AND ATOMIC MASSES INTRODUCTION An element is a fundamental substance that cannot be broken down by chemical means into simpler substances. Elements are the building blocks of all matter. Currently 106 different elements are known. Of these only 88 are found naturally. Some of the other elem ...
Study Guide KEY Exam III F 2012
... c) Fe3+ + 2I- d) Rate = 22.5[0.090]1[0.50]2 = 0.50625 or 0.51 M/s e) If k is relatively large, than the rate is relatively fast and the activation energy hill would be relatively small. 3. Explain how/why changes in temperature result in a change in rate constant, k. Include an appropriate graph. ...
... c) Fe3+ + 2I- d) Rate = 22.5[0.090]1[0.50]2 = 0.50625 or 0.51 M/s e) If k is relatively large, than the rate is relatively fast and the activation energy hill would be relatively small. 3. Explain how/why changes in temperature result in a change in rate constant, k. Include an appropriate graph. ...
Electrolysis of water
Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) due to an electric current being passed through the water.This technique can be used to make hydrogen fuel (hydrogen gas) and breathable oxygen; though currently most industrial methods make hydrogen fuel from natural gas instead.