Progression of Learning in Secondary School Chemistry Secondary
... Associates a characteristic property of a substance or material with its use (e.g. metal is used to make pots because it is a good conductor of heat) Physical Changes Recognizes different physical changes Molecule Describes a molecule using Dalton's atomic model (combination of atoms linked by chemi ...
... Associates a characteristic property of a substance or material with its use (e.g. metal is used to make pots because it is a good conductor of heat) Physical Changes Recognizes different physical changes Molecule Describes a molecule using Dalton's atomic model (combination of atoms linked by chemi ...
SAMPLE QUESTION PAPER SIR.S.M.TAHIR CHEMISTRY Mob: 9557076999
... (a) Aldehydes are more reactive than ketone towards nucleophiles. (b) The aldehydes and ketones have lower boiling points than the corresponding acids. (c) The aldehydes and ketones undergo a number of addition reactions. (ii) Give chemical tests to distinguish between (a) acetaldehyde and benzaldeh ...
... (a) Aldehydes are more reactive than ketone towards nucleophiles. (b) The aldehydes and ketones have lower boiling points than the corresponding acids. (c) The aldehydes and ketones undergo a number of addition reactions. (ii) Give chemical tests to distinguish between (a) acetaldehyde and benzaldeh ...
Enthalpy
... Heat at constant pressure Consider the case where no non-expansion work is done and where the volume of the system does not change. Since V=0, w=0 and all the heat q involved in the change is thus equal to the internal energy. ...
... Heat at constant pressure Consider the case where no non-expansion work is done and where the volume of the system does not change. Since V=0, w=0 and all the heat q involved in the change is thus equal to the internal energy. ...
2013-2014
... A. Gritted by teeth makes antacids hotter, so it will be more reactive. B. The enzyme of the saliva can activate the antacids. C. D. ...
... A. Gritted by teeth makes antacids hotter, so it will be more reactive. B. The enzyme of the saliva can activate the antacids. C. D. ...
Document
... Atomic Mass Atoms are so small, it is difficult to discuss how much they weigh in grams Use atomic mass units. an atomic mass unit (amu) is one twelfth the mass of a carbon-12 atom This gives us a basis for comparison The decimal numbers on the table are atomic masses in amu ...
... Atomic Mass Atoms are so small, it is difficult to discuss how much they weigh in grams Use atomic mass units. an atomic mass unit (amu) is one twelfth the mass of a carbon-12 atom This gives us a basis for comparison The decimal numbers on the table are atomic masses in amu ...
Aqueous Solutions
... 3) describe the loss and gain of electron(s), respectively. 4) result in a change in the oxidation states of the species involved. 5) 1, 3, and 4 are true ...
... 3) describe the loss and gain of electron(s), respectively. 4) result in a change in the oxidation states of the species involved. 5) 1, 3, and 4 are true ...
Ch 3 Chemical Reactions 2013-Sept-08
... Metal Sulfides are black and metal sulfides come from the center of the earth. Sulfides are insoluble in water so they form a black mass in the deep ocean floor cracks. Chemical Reactions are the heart of Chemistry. This chapter is an introduction to symbols and chemical reactions. 3.1 Intro to Chem ...
... Metal Sulfides are black and metal sulfides come from the center of the earth. Sulfides are insoluble in water so they form a black mass in the deep ocean floor cracks. Chemical Reactions are the heart of Chemistry. This chapter is an introduction to symbols and chemical reactions. 3.1 Intro to Chem ...
1.0 basic concepts
... Ag1+(aq) and NO31-(aq) are dissociated ions As they are different, they are not spectator ions and cannot be cancelled out 6) Rewrite the balanced ionic equation without the spectator ions ...
... Ag1+(aq) and NO31-(aq) are dissociated ions As they are different, they are not spectator ions and cannot be cancelled out 6) Rewrite the balanced ionic equation without the spectator ions ...
chem equation Pkt Student2
... A reactant or product in the solid state Alternative to (s); used only for a precipitate (solid) falling out of solution A reactant or product in the liquid state A reactant or product in aqueous solution (dissolved in water) A reactant or product in the gaseous state Alternative to (g); used only f ...
... A reactant or product in the solid state Alternative to (s); used only for a precipitate (solid) falling out of solution A reactant or product in the liquid state A reactant or product in aqueous solution (dissolved in water) A reactant or product in the gaseous state Alternative to (g); used only f ...
Chapter 8 Thermochemistry
... • NH4NO3 (s) à NH4+ (aq) + NO3- (aq) • Experiment gives qreaction = 351 J for one gram of ammonium nitrate • For one mole, this is ...
... • NH4NO3 (s) à NH4+ (aq) + NO3- (aq) • Experiment gives qreaction = 351 J for one gram of ammonium nitrate • For one mole, this is ...
Student Review packet
... immersed in a beaker containing 1.0 M CuSO4(aq) at 25oC, as shown in the diagram above. As the cell operates, copper metal is deposited onto one electrode and O2(g) is produced at the other electrode. The two reduction half-reactions for the overall reaction that occurs in the cell are shown in the ...
... immersed in a beaker containing 1.0 M CuSO4(aq) at 25oC, as shown in the diagram above. As the cell operates, copper metal is deposited onto one electrode and O2(g) is produced at the other electrode. The two reduction half-reactions for the overall reaction that occurs in the cell are shown in the ...
Cheat Sheet for Chemical Equilibrium
... needed) and compare with Ksp: o Q>Ksp, precipitate will form o Q=Ksp, at equilibrium o Q
... needed) and compare with Ksp: o Q>Ksp, precipitate will form o Q=Ksp, at equilibrium o Q
Mole Equation Homework Hint: Start equations with the numbers
... 3. Iron (III) oxide is formed when iron combines with oxygen. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen? 4Fe(s) + 3O2(g) --> 2Fe2 O3(s) ...
... 3. Iron (III) oxide is formed when iron combines with oxygen. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen? 4Fe(s) + 3O2(g) --> 2Fe2 O3(s) ...
Unit 5 Test Review
... produced if a given amount of moles of reactant was reacted. Which quantities would be essential in order to solve such a problem? Bubble in all that apply - but only those that are essential to this calculation. a. The molar mass of the reactant b. The molar mass of the product c. The coefficients ...
... produced if a given amount of moles of reactant was reacted. Which quantities would be essential in order to solve such a problem? Bubble in all that apply - but only those that are essential to this calculation. a. The molar mass of the reactant b. The molar mass of the product c. The coefficients ...
File
... Calculate Kc for this system. (1.6x10-3) b) At the same temperature, a new system is made with 0.70 moles of each of the reactants. Find the concentration of the NO after equilibrium is reached. (0.0027M) 2. One of the steps in the synthesis of sulfuric acid is the combustion of sulfur dioxide: ...
... Calculate Kc for this system. (1.6x10-3) b) At the same temperature, a new system is made with 0.70 moles of each of the reactants. Find the concentration of the NO after equilibrium is reached. (0.0027M) 2. One of the steps in the synthesis of sulfuric acid is the combustion of sulfur dioxide: ...
Chemistry I Exams and Keys Corrected 2016 Season
... A) When two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers. B) The rate of any chemical reaction is proportional to the product of the masses of the reacting substances, w ...
... A) When two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers. B) The rate of any chemical reaction is proportional to the product of the masses of the reacting substances, w ...
Thermodynamics - WordPress.com
... 1. The reaction of cyanamide, NH2CN(s) with oxygen was affected in a bomb calorimeter and ∆U was found to be -742.7 kJ mol-1 of cyanamide at 298K. Calculate the enthalpy change for the reaction at 298 K. NH2CN(s) + 3/2 O2 (g) → N2(g) + CO2(g) +H2O( l ) 2. Calculate the number of kJ necessary to rais ...
... 1. The reaction of cyanamide, NH2CN(s) with oxygen was affected in a bomb calorimeter and ∆U was found to be -742.7 kJ mol-1 of cyanamide at 298K. Calculate the enthalpy change for the reaction at 298 K. NH2CN(s) + 3/2 O2 (g) → N2(g) + CO2(g) +H2O( l ) 2. Calculate the number of kJ necessary to rais ...
CHE 106 Chapter 5
... Heat of Formation (DH compound from elements) labeled DHf Heat of formation (DHf) is usually given for reactants and products in standard states (since DH depends on the state of these items). When in standard state, the denotation is DH°f ...
... Heat of Formation (DH compound from elements) labeled DHf Heat of formation (DHf) is usually given for reactants and products in standard states (since DH depends on the state of these items). When in standard state, the denotation is DH°f ...
