Document
... greater the charge difference, the more energy is stored within the system. (c) Chemical - this is slightly more complex. Certain chemicals have bonds which require little energy to break. This energy must be put into the bond to break it. However, during the course of the chemical reaction, new bon ...
... greater the charge difference, the more energy is stored within the system. (c) Chemical - this is slightly more complex. Certain chemicals have bonds which require little energy to break. This energy must be put into the bond to break it. However, during the course of the chemical reaction, new bon ...
Revised (12 Sept 2009) Topic: Chemical Equilibrium
... above reaction quotient expression. If the new ratio, V2/nN2, in the Qc expression is greater than the original ratio in the Kc expression, then Qc is greater than Kc and the position of equilibrium must shift to the left. If the new ratio is less than the original ratio, then Qc is less than Kc and ...
... above reaction quotient expression. If the new ratio, V2/nN2, in the Qc expression is greater than the original ratio in the Kc expression, then Qc is greater than Kc and the position of equilibrium must shift to the left. If the new ratio is less than the original ratio, then Qc is less than Kc and ...
No Slide Title
... Calculate the quantity of heat absorbed by 50.0 kg of rocks if their temperature increases by 12 C. Assume that the specific heat of the rocks is 0.821 J/ g K. What temperature change would these rocks undergo if they absorbed 450 kJ of heat? 3. A 25-g piece of gold (specific heat = 0.129 J/g K) an ...
... Calculate the quantity of heat absorbed by 50.0 kg of rocks if their temperature increases by 12 C. Assume that the specific heat of the rocks is 0.821 J/ g K. What temperature change would these rocks undergo if they absorbed 450 kJ of heat? 3. A 25-g piece of gold (specific heat = 0.129 J/g K) an ...
DRAFT AP® CHEMISTRY 2005 SCORING GUIDELINES
... Award consistency points for [H+] consistent with [C3H5O2-]. I would like to see 1 point moved here (perhaps from d). There is a lot here for just one point but that’s the case with all this problem. Students have to find the molar mass and the number of moles. In the interest of front loading the q ...
... Award consistency points for [H+] consistent with [C3H5O2-]. I would like to see 1 point moved here (perhaps from d). There is a lot here for just one point but that’s the case with all this problem. Students have to find the molar mass and the number of moles. In the interest of front loading the q ...
Lab # 18
... 2. Based on your procedure, why is it necessary to weigh the beaker with 1mL of oil? 3. What is a hydrate? Give an example of a hydrated substance we have used in lab. 4. Define anhydrous. How can a hydrate be changed to its anhydrous form? 5. Why would it be better to use plain popcorn instead of b ...
... 2. Based on your procedure, why is it necessary to weigh the beaker with 1mL of oil? 3. What is a hydrate? Give an example of a hydrated substance we have used in lab. 4. Define anhydrous. How can a hydrate be changed to its anhydrous form? 5. Why would it be better to use plain popcorn instead of b ...
The Major Classes of Chemical Reactions
... 4.1A). On the other hand, in covalent bonds between nonidentical atoms, the sharing is unequal: one atom attracts the electron pair more strongly than the other. For reasons discussed in Chapter 9, an O atom attracts electrons more strongly than an H atom. Therefore, in each O-H bond in water, the s ...
... 4.1A). On the other hand, in covalent bonds between nonidentical atoms, the sharing is unequal: one atom attracts the electron pair more strongly than the other. For reasons discussed in Chapter 9, an O atom attracts electrons more strongly than an H atom. Therefore, in each O-H bond in water, the s ...
Chemistry (306) - National Evaluation Series
... Protection Agency (EPA) for its research into polyols made from renewable biological resources. The quality and performance of the polyurethane foam made from these non-petroleum-based polyols proved comparable to the quality and performance of the polyurethane foam made from petroleumbased polyols. ...
... Protection Agency (EPA) for its research into polyols made from renewable biological resources. The quality and performance of the polyurethane foam made from these non-petroleum-based polyols proved comparable to the quality and performance of the polyurethane foam made from petroleumbased polyols. ...
PDF File
... the observed K1/2 values equal the dissociation constants Kd (see also ref 37): The same K1/2 values were observed in concentration dependences in which the maximal rate constant for reaction varied by more than 10-fold, which was accomplished by a 2′-H substitution at position -1 and by varying the ...
... the observed K1/2 values equal the dissociation constants Kd (see also ref 37): The same K1/2 values were observed in concentration dependences in which the maximal rate constant for reaction varied by more than 10-fold, which was accomplished by a 2′-H substitution at position -1 and by varying the ...
Fundamentals Diagnostic Quiz
... d) A compound is a specific combination of atoms of more than one element. e) In a chemical reaction, atoms are neither created nor destroyed; they exchange partners to produce new substances. ...
... d) A compound is a specific combination of atoms of more than one element. e) In a chemical reaction, atoms are neither created nor destroyed; they exchange partners to produce new substances. ...
Document
... The potential or capacity to move matter. One form of energy can be converted to another form of energy: electromagnetic, mechanical, electrical, or chemical. Next, we’ll study kinetic energy, potential energy, and internal energy. ...
... The potential or capacity to move matter. One form of energy can be converted to another form of energy: electromagnetic, mechanical, electrical, or chemical. Next, we’ll study kinetic energy, potential energy, and internal energy. ...
G o rxn
... reaction more or less spontaneous at °this elevated temperature; that is, is the value of ΔGorxn more negative (more spontaneous) or more positive (less spontaneous)? Solution ...
... reaction more or less spontaneous at °this elevated temperature; that is, is the value of ΔGorxn more negative (more spontaneous) or more positive (less spontaneous)? Solution ...
Experiment 16: Spectrophotometric Determination of an Equilibrium Constant
... concentrations of each of the species involved in the expression. We can carry out the reaction under conditions where the concentration of H+ remains constant and thus is known. In addition, we can determine the concentration of FeSCN2+ spectrophotometrically, and then use this value in calculating ...
... concentrations of each of the species involved in the expression. We can carry out the reaction under conditions where the concentration of H+ remains constant and thus is known. In addition, we can determine the concentration of FeSCN2+ spectrophotometrically, and then use this value in calculating ...
Chemistry 3202 Grading Standards June 2006
... Students: - treated the item as an indicator problem (i.e. used the indicator table to answer the question). - identified NO3G as a strong base; when base was added, the solution turned blue. - did not identify AgCl as the precipitate. (ii) When the equilibrium is placed in an ice bath it turns pale ...
... Students: - treated the item as an indicator problem (i.e. used the indicator table to answer the question). - identified NO3G as a strong base; when base was added, the solution turned blue. - did not identify AgCl as the precipitate. (ii) When the equilibrium is placed in an ice bath it turns pale ...
Chapter 15. Chemical Equilibrium
... However, if we start with just ammonia and no nitrogen or hydrogen, the reaction will proceed and N2 and H2 will be produced until equilibrium is achieved. No matter what the starting composition of reactants and products is, the equilibrium mixture contains the same relative concentrations of react ...
... However, if we start with just ammonia and no nitrogen or hydrogen, the reaction will proceed and N2 and H2 will be produced until equilibrium is achieved. No matter what the starting composition of reactants and products is, the equilibrium mixture contains the same relative concentrations of react ...
chapter i states of matter - myweb
... components that make up the mixture retain their physicochemical properties intact. The composition of a heterogeneous mixture may or may not be (statistically) uniform throughout. The components of homogeneous and heterogeneous mixtures can be separated and recovered as pure substances by means of ...
... components that make up the mixture retain their physicochemical properties intact. The composition of a heterogeneous mixture may or may not be (statistically) uniform throughout. The components of homogeneous and heterogeneous mixtures can be separated and recovered as pure substances by means of ...
B - eko.olunet.org
... hours at 150 °C until a precipitate is formed (reaction 2). Thereafter it is treated with HCl at 70 °C (pH 3-4) (reaction 3). As a result, the precipitate partially dissolves. The remaining precipitate is filtered off and heated. An oxide containing 12.12% oxygen is formed (reaction 4). The filtrate ...
... hours at 150 °C until a precipitate is formed (reaction 2). Thereafter it is treated with HCl at 70 °C (pH 3-4) (reaction 3). As a result, the precipitate partially dissolves. The remaining precipitate is filtered off and heated. An oxide containing 12.12% oxygen is formed (reaction 4). The filtrate ...
File
... Examples of chemical systems in equilibrium: 1. Solubility Equilibrium • in solubility equilibrium the ________ solute particles continuously dissolve into solution, while an equal number of dissolved solute particles in solution crystallize or _________ out of solution 2. Phase Equilibrium - in ph ...
... Examples of chemical systems in equilibrium: 1. Solubility Equilibrium • in solubility equilibrium the ________ solute particles continuously dissolve into solution, while an equal number of dissolved solute particles in solution crystallize or _________ out of solution 2. Phase Equilibrium - in ph ...
Worksheet Significant Figures
... graphs are used when the data is qualitative (descriptive, based on observations or categories of data). Line graphs are used when the data is quantitative (more precise, measured with tools). **VERY IMPORTANT** When designing an experiment, you should have only one independent and one dependent var ...
... graphs are used when the data is qualitative (descriptive, based on observations or categories of data). Line graphs are used when the data is quantitative (more precise, measured with tools). **VERY IMPORTANT** When designing an experiment, you should have only one independent and one dependent var ...
