AP® Chemistry 2009 Free-Response Questions - AP Central
... Answer Question 4 below. The Section II score weighting for this question is 10 percent. 4. For each of the following three reactions, write a balanced equation in part (i) and answer the question in part (ii). In part (i), coefficients should be in terms of lowest whole numbers. Assume that solutio ...
... Answer Question 4 below. The Section II score weighting for this question is 10 percent. 4. For each of the following three reactions, write a balanced equation in part (i) and answer the question in part (ii). In part (i), coefficients should be in terms of lowest whole numbers. Assume that solutio ...
AS Chemistry - Crawshaw Academy
... (d) use calculators to find and use power, exponential and logarithmic functions. ...
... (d) use calculators to find and use power, exponential and logarithmic functions. ...
sample chapter
... Table 4.1 lists examples of strong electrolytes, weak electrolytes, and nonelectrolytes. Ionic compounds, such as sodium chloride, potassium iodide (KI), and calcium nitrate [Ca(NO3)2], are strong electrolytes. It is interesting to note that human body fluids contain many strong and weak electrolyte ...
... Table 4.1 lists examples of strong electrolytes, weak electrolytes, and nonelectrolytes. Ionic compounds, such as sodium chloride, potassium iodide (KI), and calcium nitrate [Ca(NO3)2], are strong electrolytes. It is interesting to note that human body fluids contain many strong and weak electrolyte ...
Elements (NonMetals)
... Lowest density of any chemical substance Used in blimps in 1930s but flammable Gas at room Temp B.P. –253°C (20K) and M.P.-259°C (14K) Insoluble in water: 2mL gas/ 1L of water Found in H2O, organic and biological molecules Most common element in universe H2 (H-H) isoelectronic with He H has a small ...
... Lowest density of any chemical substance Used in blimps in 1930s but flammable Gas at room Temp B.P. –253°C (20K) and M.P.-259°C (14K) Insoluble in water: 2mL gas/ 1L of water Found in H2O, organic and biological molecules Most common element in universe H2 (H-H) isoelectronic with He H has a small ...
In_Class_Practice Chapter 17 PreAP
... 6. Use Le Châtelier’s principle to predict how each of the following changes would affect this equilibrium. C2H4O(g) CH4(g) + CO(g) a. adding CH4(g) to the system b. removing CO(g) from the system c. removing C2H4O(g) from the system 7. How would decreasing the volume of the reaction vessel affect ...
... 6. Use Le Châtelier’s principle to predict how each of the following changes would affect this equilibrium. C2H4O(g) CH4(g) + CO(g) a. adding CH4(g) to the system b. removing CO(g) from the system c. removing C2H4O(g) from the system 7. How would decreasing the volume of the reaction vessel affect ...
Acids and Bases
... source are placed in a beaker of water, the light bulb will not glow. If an electrolyte, such as sodium chloride, is dissolved in the water, the light bulb will glow because the solution can now conduct electricity. The amount of electric current that can be carried by an electrolyte solution is pro ...
... source are placed in a beaker of water, the light bulb will not glow. If an electrolyte, such as sodium chloride, is dissolved in the water, the light bulb will glow because the solution can now conduct electricity. The amount of electric current that can be carried by an electrolyte solution is pro ...
Chapter 19.1 Balancing Redox Equations
... state, the faster is the reaction. c) All collisions between molecules with at least a minimum kinetic energy and the proper orientation result in reaction. d) All collisions between molecules with at least a minimum kinetic energy result in reaction. ...
... state, the faster is the reaction. c) All collisions between molecules with at least a minimum kinetic energy and the proper orientation result in reaction. d) All collisions between molecules with at least a minimum kinetic energy result in reaction. ...
PPT: Chemical Reactions Review
... Balancing by Half-Reactions *in basic solution 1. Assign oxidation states. 2. Write separate half-reactions for the reduction/oxidation reactions. 3. Balance all the atoms EXCEPT O and H. 4. Balance the oxygen by adding water (H2O). 5. Balance the hydrogen by adding H+. 6. Balance the charge by add ...
... Balancing by Half-Reactions *in basic solution 1. Assign oxidation states. 2. Write separate half-reactions for the reduction/oxidation reactions. 3. Balance all the atoms EXCEPT O and H. 4. Balance the oxygen by adding water (H2O). 5. Balance the hydrogen by adding H+. 6. Balance the charge by add ...
Document
... 1. Color the carbon atoms black, the oxygen atoms red, and leave the hydrogen atoms white. 2. Use scissors to carefully cut out the atoms. o Build the reactants: 3. On a sheet of paper, place the atoms together to make the molecules of the reactants on the left side of the chemical equation for the ...
... 1. Color the carbon atoms black, the oxygen atoms red, and leave the hydrogen atoms white. 2. Use scissors to carefully cut out the atoms. o Build the reactants: 3. On a sheet of paper, place the atoms together to make the molecules of the reactants on the left side of the chemical equation for the ...
South Pasadena • AP Chemistry
... 8. If some of the gas bubbles from the reaction had escaped out the bottom of the tube, how would this have affected your molar volume at STP? Explain. ...
... 8. If some of the gas bubbles from the reaction had escaped out the bottom of the tube, how would this have affected your molar volume at STP? Explain. ...
Unit 8 Homework Packet
... Calculate the mass of chlorine gas required to produce 5.00 × 10-3 g of chlorine monofluoride given an excess of fluorine gas. ...
... Calculate the mass of chlorine gas required to produce 5.00 × 10-3 g of chlorine monofluoride given an excess of fluorine gas. ...
112 ex i lec outline
... Since an electrode potential, E°, depends upon the concentration of the solutions used in the electrode, a cell may be constructed from two half-cells composed of the same materials but differing in concentration of ions. The spontaneous reaction occurs in the directions that tends to make the two i ...
... Since an electrode potential, E°, depends upon the concentration of the solutions used in the electrode, a cell may be constructed from two half-cells composed of the same materials but differing in concentration of ions. The spontaneous reaction occurs in the directions that tends to make the two i ...
Exam #1 Review - Villanova University
... 7. Describe the structure of water and relate it to why ice is less dense then water. 8. Distinguish between crystalline and amorphous solids and give examples of each. 9. Characterize ionic, covalent, molecular and metallic crystals including general properties and examples of each. ...
... 7. Describe the structure of water and relate it to why ice is less dense then water. 8. Distinguish between crystalline and amorphous solids and give examples of each. 9. Characterize ionic, covalent, molecular and metallic crystals including general properties and examples of each. ...
cbse class – x science solutions
... electronic structure. (v) What would be the ratio of number of combining atoms in a compound formed by the combination of element A with carbon? (vi) Which one of the given elements is likely to have the smallest atomic radius? (i) The element A combines with chlorine is form an acid and its oxide i ...
... electronic structure. (v) What would be the ratio of number of combining atoms in a compound formed by the combination of element A with carbon? (vi) Which one of the given elements is likely to have the smallest atomic radius? (i) The element A combines with chlorine is form an acid and its oxide i ...
Part 3 Answers Only for Questions, Exercises, and Problems in The
... 8. The particles in a solid occupy fixed positions relative to each other and cannot be poured, but different pieces of solids can move relative to each other. The slogan emphasizes that this brand of table salt has solid pieces small enough to move freely relative to one another, but not so small t ...
... 8. The particles in a solid occupy fixed positions relative to each other and cannot be poured, but different pieces of solids can move relative to each other. The slogan emphasizes that this brand of table salt has solid pieces small enough to move freely relative to one another, but not so small t ...
PH
In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic. Pure water is neutral, being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.pH measurements are important in medicine, biology, chemistry, agriculture, forestry, food science, environmental science, oceanography, civil engineering, chemical engineering, nutrition, water treatment & water purification, and many other applications. The pH scale is traceable to a set of standard solutions whose pH is established by international agreement.Primary pH standard values are determined using a concentration cell with transference, by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode.The pH of aqueous solutions can be measured with a glass electrode and a pH meter, or indicator.pH is the negative of the logarithm to base 10 of the activity of the (solvated) hydronium ion, more often (albeit somewhat inaccurately) expressed as the measure of the hydronium ion concentration.The rest of this article uses the technically correct word ""base"" and its inflections in place of ""alkaline"", which specifically refers to a base dissolved in water, and its inflections.