chemistry intermediate may 2010 marking scheme
... mechanism showing propagation and termination steps is not required. (2) (3 marks) 13. Give the name and structural formula of the main organic product obtained when but-1-ene reacts with hydrogen iodide. 2-iodobutane (1); assign 2 marks for correct structural formula (3 marks) 14. Explain why a sol ...
... mechanism showing propagation and termination steps is not required. (2) (3 marks) 13. Give the name and structural formula of the main organic product obtained when but-1-ene reacts with hydrogen iodide. 2-iodobutane (1); assign 2 marks for correct structural formula (3 marks) 14. Explain why a sol ...
Balancing Chemical Reactions
... In the previous section we showed two reactions that appear to be “balanced” and yet are chemically incorrect. How can this be true? The answer to this question requires us to see that the reaction we are trying to balance involves a transfer of electrons from one reactant to another reactant. We ca ...
... In the previous section we showed two reactions that appear to be “balanced” and yet are chemically incorrect. How can this be true? The answer to this question requires us to see that the reaction we are trying to balance involves a transfer of electrons from one reactant to another reactant. We ca ...
Recording Measurements
... - refer to your notes & RB p. 131-133 39. A student used blue litmus paper and phenolphthalein paper as indicators to test the pH of distilled water and five aqueous household solutions. Then the student used a pH meter to measure the pH of the distilled water and each solution. The results of the s ...
... - refer to your notes & RB p. 131-133 39. A student used blue litmus paper and phenolphthalein paper as indicators to test the pH of distilled water and five aqueous household solutions. Then the student used a pH meter to measure the pH of the distilled water and each solution. The results of the s ...
Chemistry1100 Practice Exam 4 Choose the best answer for
... 11. A compound has an empirical formula CH2- An independent analysis gave a value of 70 for its molar mass. What is the correct molecular formula? a. C2H4 b. C3H6 c. C4O8 d. C5H10 e. C5H11 12. Given the balanced chemical equation, C4H4 + 5 O2 → 4 CO2 + 2 H2O. If 0.3618 moles of C4H4 are allowed to ...
... 11. A compound has an empirical formula CH2- An independent analysis gave a value of 70 for its molar mass. What is the correct molecular formula? a. C2H4 b. C3H6 c. C4O8 d. C5H10 e. C5H11 12. Given the balanced chemical equation, C4H4 + 5 O2 → 4 CO2 + 2 H2O. If 0.3618 moles of C4H4 are allowed to ...
Acid Base PPT - mvhs
... The pH Scale The pH of a solution is defined as the negative of the common logarithm of the hydronium ion concentration. pH= -log [H3O+] The pOH of a solution is defined as the negative of the common logarithm of the hydroxide ion concentration. ...
... The pH Scale The pH of a solution is defined as the negative of the common logarithm of the hydronium ion concentration. pH= -log [H3O+] The pOH of a solution is defined as the negative of the common logarithm of the hydroxide ion concentration. ...
5.111 Principles of Chemical Science
... (b) Is this drug likely to be a useful pharmaceutical agent? Since the vast majority of the compound is in the inactive form at physiological pH, it is unlikely to be a useful pharmaceutical agent.* Ideally, most of the compound would be active in the body. *However, if the active compound is highly ...
... (b) Is this drug likely to be a useful pharmaceutical agent? Since the vast majority of the compound is in the inactive form at physiological pH, it is unlikely to be a useful pharmaceutical agent.* Ideally, most of the compound would be active in the body. *However, if the active compound is highly ...
Practice Qs - Unit 10 Acid Base
... - refer to your notes & RB p. 131-133 39. A student used blue litmus paper and phenolphthalein paper as indicators to test the pH of distilled water and five aqueous household solutions. Then the student used a pH meter to measure the pH of the distilled water and each solution. The results of the s ...
... - refer to your notes & RB p. 131-133 39. A student used blue litmus paper and phenolphthalein paper as indicators to test the pH of distilled water and five aqueous household solutions. Then the student used a pH meter to measure the pH of the distilled water and each solution. The results of the s ...
Unit 4 - Calculations and Chemical Reactions
... 4.6 Classification of Chemical Reactions There is no comprehensive classification scheme that would accommodate all known chemical reactions. One approach is to classify reactions into four types: combination, decomposition, single replacement and double replacement reactions. I) Combination Reacti ...
... 4.6 Classification of Chemical Reactions There is no comprehensive classification scheme that would accommodate all known chemical reactions. One approach is to classify reactions into four types: combination, decomposition, single replacement and double replacement reactions. I) Combination Reacti ...
PHYSICAL SETTING CHEMISTRY
... A student first masses an empty crucible (a heat-resistant container). The student then masses the crucible containing a sample of CuSO4•5H2O(s). The student repeatedly heats and masses the crucible and its contents until the mass is constant. The student’s recorded experimental data and calculation ...
... A student first masses an empty crucible (a heat-resistant container). The student then masses the crucible containing a sample of CuSO4•5H2O(s). The student repeatedly heats and masses the crucible and its contents until the mass is constant. The student’s recorded experimental data and calculation ...
9647 H2 Chemistry
... discuss the effects on the entropy of a chemical system by the following: (i) change in temperature (ii) change in phase (iii) change in the number of particles (especially for gaseous systems) (iv) mixing of particles [quantitative treatment is not required] ...
... discuss the effects on the entropy of a chemical system by the following: (i) change in temperature (ii) change in phase (iii) change in the number of particles (especially for gaseous systems) (iv) mixing of particles [quantitative treatment is not required] ...
Chemical Equations
... We need to be familiar with the solubility rules of common ionic compounds in order to write the ionic and net ionic reactions. In aqueous solution, soluble ionic compounds are completely separated into their positive and negative ions. "Pb(NO3)2 (aq)" would be written "Pb2+ (aq) + 2 NO3– (aq)". The ...
... We need to be familiar with the solubility rules of common ionic compounds in order to write the ionic and net ionic reactions. In aqueous solution, soluble ionic compounds are completely separated into their positive and negative ions. "Pb(NO3)2 (aq)" would be written "Pb2+ (aq) + 2 NO3– (aq)". The ...
Crystal Field Theory, gemstones and color
... metal ions in crystals using a purely electrostatic bonding model. We will use this theory to explain the color of the gemstones ruby and emerald, and will see the limitations of the theory ...
... metal ions in crystals using a purely electrostatic bonding model. We will use this theory to explain the color of the gemstones ruby and emerald, and will see the limitations of the theory ...
Questions - SMK Raja Perempuan Ipoh
... temperature and pressure (STP) 3. generalization : One mole of any gas always occupies the same volume under the same temperature and pressure; Example i) 1 mol of oxygen gas, 1 mol of ammonia gas, 1 mol helium gas and 1 mol sulphur dioxide gas occupies the same volume of 24 dm3 at room condition ...
... temperature and pressure (STP) 3. generalization : One mole of any gas always occupies the same volume under the same temperature and pressure; Example i) 1 mol of oxygen gas, 1 mol of ammonia gas, 1 mol helium gas and 1 mol sulphur dioxide gas occupies the same volume of 24 dm3 at room condition ...
Chemical Reactions and Equations - 2012 Book Archive
... 1. From the statement “nitrogen and hydrogen react to produce ammonia,” identify the reactants and the products. 2. From the statement “sodium metal reacts with water to produce sodium hydroxide and hydrogen,” identify the reactants and the products. 3. From the statement “magnesium hydroxide reacts ...
... 1. From the statement “nitrogen and hydrogen react to produce ammonia,” identify the reactants and the products. 2. From the statement “sodium metal reacts with water to produce sodium hydroxide and hydrogen,” identify the reactants and the products. 3. From the statement “magnesium hydroxide reacts ...
Table of contents
... ◦ Halogens are highly reactive nonmetals (form -1 anions). Highly variable physical properties. Low boiling points. Gases at room temperature. ◦ Transition elements – very hard, very high melting and boiling points. Very malleable and conducts electricity since d electrons are loose. Low ionization ...
... ◦ Halogens are highly reactive nonmetals (form -1 anions). Highly variable physical properties. Low boiling points. Gases at room temperature. ◦ Transition elements – very hard, very high melting and boiling points. Very malleable and conducts electricity since d electrons are loose. Low ionization ...
Admission Information Brochure
... Krishna, Guntur and Prakasam belonging to Andhra University area. 1. A candidate shall be regarded as a local candidate in relation to a local area (AU/OU/SVU); 1.1 If he/she has studied in an educational institution or educational institutions in such local area for a period of not less than four c ...
... Krishna, Guntur and Prakasam belonging to Andhra University area. 1. A candidate shall be regarded as a local candidate in relation to a local area (AU/OU/SVU); 1.1 If he/she has studied in an educational institution or educational institutions in such local area for a period of not less than four c ...
2 day in-class guided inquiry exercise
... e) given the structures of Beryl and Corundum, explain using a physical model why the two materials have such different harndesses. Breakdown of CFT - covalency One of the useful things about crystal field theory is its predictive nature. Once we know a crystal field splitting pattern and what atoms ...
... e) given the structures of Beryl and Corundum, explain using a physical model why the two materials have such different harndesses. Breakdown of CFT - covalency One of the useful things about crystal field theory is its predictive nature. Once we know a crystal field splitting pattern and what atoms ...
Organic Chemical Reactions
... directions is inserted between reactants and products. However, many organic reactions are almost completely shifted towards the products and the residual concentration of the reactants at the end of the reaction is negligible. This happens when the equilibrium constant is very high. For those react ...
... directions is inserted between reactants and products. However, many organic reactions are almost completely shifted towards the products and the residual concentration of the reactants at the end of the reaction is negligible. This happens when the equilibrium constant is very high. For those react ...
Electrochemistry
Electrochemistry is the branch of physical chemistry that studies chemical reactions which take place at the interface of an electrode, usually a solid metal or a semiconductor, and an ionic conductor, the electrolyte. These reactions involve electric charges moving between the electrodes and the electrolyte (or ionic species in a solution). Thus electrochemistry deals with the interaction between electrical energy and chemical change.When a chemical reaction is caused by an externally supplied current, as in electrolysis, or if an electric current is produced by a spontaneous chemical reaction as in a battery, it is called an electrochemical reaction. Chemical reactions where electrons are transferred directly between molecules and/or atoms are called oxidation-reduction or (redox) reactions. In general, electrochemistry describes the overall reactions when individual redox reactions are separate but connected by an external electric circuit and an intervening electrolyte.