Exam - Vcaa
... questions are correct, and sign your name in the space provided to verify this. • All written responses must be in English. At the end of the examination • Place the answer sheet for multiple-choice questions inside the front cover of this book. • You may keep the data book. Students are NOT permitt ...
... questions are correct, and sign your name in the space provided to verify this. • All written responses must be in English. At the end of the examination • Place the answer sheet for multiple-choice questions inside the front cover of this book. • You may keep the data book. Students are NOT permitt ...
Bk2P06EE
... temperature drops as it dissolves. The backward reaction of crystallization is an exothermic process. On cooling a saturated solution from 100 C to room temperature, heat is removed from the system. By Le Chatelier’s principle, processes occur in the system to counteract the loss of heat by favouri ...
... temperature drops as it dissolves. The backward reaction of crystallization is an exothermic process. On cooling a saturated solution from 100 C to room temperature, heat is removed from the system. By Le Chatelier’s principle, processes occur in the system to counteract the loss of heat by favouri ...
AP Chemistry
... (A) determine the mass of solute that was added. represented above, the entropy change might be expected to (B) determine the mass of the thermometer. be positive. However, S for the process is actually negative. (C) determine the mass of water that evaporated. Which best helps to account for the n ...
... (A) determine the mass of solute that was added. represented above, the entropy change might be expected to (B) determine the mass of the thermometer. be positive. However, S for the process is actually negative. (C) determine the mass of water that evaporated. Which best helps to account for the n ...
03 Inorg. drugs with acid-base prop. IOC of С,Al, Ba,Ag
... (BrPh, SPU). Alkalimetry, direct titration. Dissolve 1.000 g with heating in 100 ml of water R containing 15 g of mannitol R. Titrate with 1 M sodium hydroxide, using 0.5 ml of phenolphthalein solution R as indicator, until a pink colour is obtained. 1 ml of 1 M sodium hydroxide is equivalent to 61. ...
... (BrPh, SPU). Alkalimetry, direct titration. Dissolve 1.000 g with heating in 100 ml of water R containing 15 g of mannitol R. Titrate with 1 M sodium hydroxide, using 0.5 ml of phenolphthalein solution R as indicator, until a pink colour is obtained. 1 ml of 1 M sodium hydroxide is equivalent to 61. ...
1 [Turn Over Section A For each question there are four possible
... When iron filings are added to nitric acid, a yellow solution and nitrogen dioxide gas are formed. On the addition of ammonium thiocyanate to the resultant solution, a bloodred colouration due to an iron (III) complex is formed. Which statements are correct? ...
... When iron filings are added to nitric acid, a yellow solution and nitrogen dioxide gas are formed. On the addition of ammonium thiocyanate to the resultant solution, a bloodred colouration due to an iron (III) complex is formed. Which statements are correct? ...
KEY
... 3. For this reaction ∆G◦ is negative. 4. At point C, the system is at equilibrium. 5. At point D, the reaction will move toward the reactants to get to equilibrium. Explanation: ∆G◦ is negative (point E is lower free energy than point A), K > 1. At point B, the reaction will move to the products (Q ...
... 3. For this reaction ∆G◦ is negative. 4. At point C, the system is at equilibrium. 5. At point D, the reaction will move toward the reactants to get to equilibrium. Explanation: ∆G◦ is negative (point E is lower free energy than point A), K > 1. At point B, the reaction will move to the products (Q ...
Chapter 4 Aqueous Reactions and Solution Stoichiometry
... will be very unpopular! • But just as in the previous examples, a gas is formed as a product of this reaction. Na2S (aq) + H2SO4 (aq) ...
... will be very unpopular! • But just as in the previous examples, a gas is formed as a product of this reaction. Na2S (aq) + H2SO4 (aq) ...
avogadro exam 2012 - University of Waterloo
... A 10.0 L container has a sample of O2(g) at 25 C and 51 kPa. A second 10.0 L container has a o sample of CH4(g), also at 25 C and 51 kPa. Assuming ideal gas behaviour, which of the following statements concerning these two samples is correct? ...
... A 10.0 L container has a sample of O2(g) at 25 C and 51 kPa. A second 10.0 L container has a o sample of CH4(g), also at 25 C and 51 kPa. Assuming ideal gas behaviour, which of the following statements concerning these two samples is correct? ...
1.8 Thermodynamics
... • If there is not enough energy, it is taken in from the surroundings - endothermic • These can all be calculated in another type of Hess's cycle: ...
... • If there is not enough energy, it is taken in from the surroundings - endothermic • These can all be calculated in another type of Hess's cycle: ...
examination review
... 4.2 - Precipitation Reactions Question 1 Give the formulas to show the reactants and the products for each of the following chemical reactions. Each of the reactions occurs in aqueous solution unless otherwise indicated. Represent substances in solution as ions if the substance is extensively ioniz ...
... 4.2 - Precipitation Reactions Question 1 Give the formulas to show the reactants and the products for each of the following chemical reactions. Each of the reactions occurs in aqueous solution unless otherwise indicated. Represent substances in solution as ions if the substance is extensively ioniz ...
Gas Laws
... 4. A mixture in which the particles are so small that they will not reflect the “light” from a laser are called ________. 5. A solution that contains a large amount of solute per amount of solvent is called a _____________ solution. 6. What is the term that is used to describe a solid being formed w ...
... 4. A mixture in which the particles are so small that they will not reflect the “light” from a laser are called ________. 5. A solution that contains a large amount of solute per amount of solvent is called a _____________ solution. 6. What is the term that is used to describe a solid being formed w ...
chemistry mcmurry fay
... Reactions that increase the number of gaseous molecules generally have a positive DS, while reactions that decrease the number of gaseous molecules have a negative DS. (a). The amount of molecular randomness in the system decreases when 2 mol of gaseous reactants combine to give 1 mol of liquid prod ...
... Reactions that increase the number of gaseous molecules generally have a positive DS, while reactions that decrease the number of gaseous molecules have a negative DS. (a). The amount of molecular randomness in the system decreases when 2 mol of gaseous reactants combine to give 1 mol of liquid prod ...
Chemistry 30 - SharpSchool
... ___________________________________________ which says that there is a ________________________________ between the concentrations of the products and the concentrations of the reactants at equilibrium ...
... ___________________________________________ which says that there is a ________________________________ between the concentrations of the products and the concentrations of the reactants at equilibrium ...
Lab 3. Chemical Reactions
... Each element or compound has unique properties that make it distinguishable from other elements or compounds. Physical properties, such as color, luster, softness, electrical conductivity, the temperature at which it melts or boils, crystal structure etc. are characteristics that are visible or meas ...
... Each element or compound has unique properties that make it distinguishable from other elements or compounds. Physical properties, such as color, luster, softness, electrical conductivity, the temperature at which it melts or boils, crystal structure etc. are characteristics that are visible or meas ...
AP 2005 Chemistry Free-Response Questions
... INFORMATION IN THE TABLE BELOW AND IN THE TABLES ON PAGES 3-5 MAY BE USEFUL IN ANSWERING ...
... INFORMATION IN THE TABLE BELOW AND IN THE TABLES ON PAGES 3-5 MAY BE USEFUL IN ANSWERING ...
Review Answers - cloudfront.net
... (c) After the NaOH solutions has been standardized, it is used to titrate a weak monoprotic acid, HX. The equivalence point is reached when 25.0 mL of NaOH solution has been added. In the space provided at the right, sketch the titration curve, showing the pH changes that occur as the volume of NaOH ...
... (c) After the NaOH solutions has been standardized, it is used to titrate a weak monoprotic acid, HX. The equivalence point is reached when 25.0 mL of NaOH solution has been added. In the space provided at the right, sketch the titration curve, showing the pH changes that occur as the volume of NaOH ...
Ch 9 Pkt - mvhs
... 7. Calculate empirical formula of a compound that has elemental composition of 28% C, 20% F, and the rest H. 8. Nicotine has a formula of CxHyNz. The combustion analysis gave the following results: 2.0 mol CO2, 1.4 mol H2O, and 0.4 mol NO2. 10. Calcium nitrate is produced by reaction of nitric acid ...
... 7. Calculate empirical formula of a compound that has elemental composition of 28% C, 20% F, and the rest H. 8. Nicotine has a formula of CxHyNz. The combustion analysis gave the following results: 2.0 mol CO2, 1.4 mol H2O, and 0.4 mol NO2. 10. Calcium nitrate is produced by reaction of nitric acid ...
N Goalby chemrevise.org 1 2.5 Transition Metals Substitution
... [Cu(H2O)6]2+ (aq) + EDTA4- (aq) [Cu (EDTA)]2- (aq) + 6H2O (l) The copper complex ion has changed from having unidentate ligands to a multidentate ligand. In this reaction there is an increase in the entropy because there are more moles of products than reactants (from 2 to 7), creating more disord ...
... [Cu(H2O)6]2+ (aq) + EDTA4- (aq) [Cu (EDTA)]2- (aq) + 6H2O (l) The copper complex ion has changed from having unidentate ligands to a multidentate ligand. In this reaction there is an increase in the entropy because there are more moles of products than reactants (from 2 to 7), creating more disord ...
advanced chemistry may 2011 marking scheme
... Natural gas, CH4, (0.5) is oxidized to CO using steam at 700 – 1100oC to form CO and H2 according to equation CH4 + H2O → CO + 3 H2. (1) More steam is passed thru’ the gas mixture (synthesis gas) in the presence of iron oxide catalyst to convert carbon monoxide into more hydrogen: CO + H2O → CO2 + H ...
... Natural gas, CH4, (0.5) is oxidized to CO using steam at 700 – 1100oC to form CO and H2 according to equation CH4 + H2O → CO + 3 H2. (1) More steam is passed thru’ the gas mixture (synthesis gas) in the presence of iron oxide catalyst to convert carbon monoxide into more hydrogen: CO + H2O → CO2 + H ...
Exam No. 1
... (a) Released and its amount depends on its order. (b) Released and its amount increases with increase of its length. **(c) Absorbed and its amount depends on its order. (d) Absorbed and its amount does not depend on any variable. 79- Element X has an electronic configuration of 1s2 252 2p6 3s2 3p1. ...
... (a) Released and its amount depends on its order. (b) Released and its amount increases with increase of its length. **(c) Absorbed and its amount depends on its order. (d) Absorbed and its amount does not depend on any variable. 79- Element X has an electronic configuration of 1s2 252 2p6 3s2 3p1. ...
Student Review packet
... A 0.500-gram sample of a weak, nonvolatile acid, HA, was dissolved in sufficient water to make 50.0 milliliters of solution. The solution was then titrated with a standard NaOH solution. Predict how the calculated molar mass of HA would be affected (too high, too low, or not affected) by the followi ...
... A 0.500-gram sample of a weak, nonvolatile acid, HA, was dissolved in sufficient water to make 50.0 milliliters of solution. The solution was then titrated with a standard NaOH solution. Predict how the calculated molar mass of HA would be affected (too high, too low, or not affected) by the followi ...
Chapter 4 Student Notes
... o As HCl is added, the magnesium hydroxide dissolves, and a clear solution containing Mg 2+ and Cl1- ions is formed. o Molecular equation: Mg(OH)2 (s) + 2 HCl(aq) MgCl2 (aq) + 2 H2O(l) o Complete ionic equation: Mg(OH)2 (s) + 2 H1+(aq) + Cl1-(aq) Mg2+(aq) + 2 Cl1-(aq) + 2 H2O(l) o Net ionic ...
... o As HCl is added, the magnesium hydroxide dissolves, and a clear solution containing Mg 2+ and Cl1- ions is formed. o Molecular equation: Mg(OH)2 (s) + 2 HCl(aq) MgCl2 (aq) + 2 H2O(l) o Complete ionic equation: Mg(OH)2 (s) + 2 H1+(aq) + Cl1-(aq) Mg2+(aq) + 2 Cl1-(aq) + 2 H2O(l) o Net ionic ...
Document
... Enthalpy and Internal Energy The precise definition of enthalpy, H, is H = U + PV Many reactions take place at constant pressure, so the change in enthalpy can be given by ...
... Enthalpy and Internal Energy The precise definition of enthalpy, H, is H = U + PV Many reactions take place at constant pressure, so the change in enthalpy can be given by ...
Part One: Ions in Aqueous Solution A. Electrolytes and Non
... Titration = process in which a solution of one reactant (the titrant) is carefully added to a solution of another reactant. Volume of titrant required for complete reaction is measured. ...
... Titration = process in which a solution of one reactant (the titrant) is carefully added to a solution of another reactant. Volume of titrant required for complete reaction is measured. ...
Thermometric titration
A thermometric titration is one of a number of instrumental titration techniques where endpoints can be located accurately and precisely without a subjective interpretation on the part of the analyst as to their location. Enthalpy change is arguably the most fundamental and universal property of chemical reactions, so the observation of temperature change is a natural choice in monitoring their progress. It is not a new technique, with possibly the first recognizable thermometric titration method reported early in the 20th century (Bell and Cowell, 1913). In spite of its attractive features, and in spite of the considerable research that has been conducted in the field and a large body of applications that have been developed; it has been until now an under-utilized technique in the critical area of industrial process and quality control. Automated potentiometric titration systems have pre-dominated in this area since the 1970s. With the advent of cheap computers able to handle the powerful thermometric titration software, development has now reached the stage where easy to use automated thermometric titration systems can in many cases offer a superior alternative to potentiometric titrimetry.The applications of thermometric titrimetry discussed on this page are by no means exhaustive. The reader is referred to the bibliography for further reading on the subject.