Question paper - Unit A173/02 - Module C7 - Higher tier (PDF
... Which of these statements describes what is happening at equilibrium? Put ticks (✓) in the boxes next to the two correct statements. The reaction between nitrogen and hydrogen has stopped. The forward and reverse reactions happen at the same rate. All of the nitrogen and hydrogen react to make ammon ...
... Which of these statements describes what is happening at equilibrium? Put ticks (✓) in the boxes next to the two correct statements. The reaction between nitrogen and hydrogen has stopped. The forward and reverse reactions happen at the same rate. All of the nitrogen and hydrogen react to make ammon ...
Chemical Reactions - We can`t sign you in
... 2. Hydrochloric acid is added to the flask, a little at a time, from a burette. 3. When all the alkali has reacted with the acid, the indicator turns colourless. The amount of acid used is noted. 4. The experiment is repeated, but without adding the indicator, as this makes the salt impure. 5. The s ...
... 2. Hydrochloric acid is added to the flask, a little at a time, from a burette. 3. When all the alkali has reacted with the acid, the indicator turns colourless. The amount of acid used is noted. 4. The experiment is repeated, but without adding the indicator, as this makes the salt impure. 5. The s ...
2 H2(g)
... 4. Chromium may be prepared from chromium (III) oxide using aluminium as a reducing agent. Calculate what mass of aluminium is needed for preparation of 0.1 kg of chromium. What mass of aluminium oxide is made this way? 5. What mass of glucose is made from 85 g of carbon dioxide by photosynthesis? 6 ...
... 4. Chromium may be prepared from chromium (III) oxide using aluminium as a reducing agent. Calculate what mass of aluminium is needed for preparation of 0.1 kg of chromium. What mass of aluminium oxide is made this way? 5. What mass of glucose is made from 85 g of carbon dioxide by photosynthesis? 6 ...
Practice Writing AP Questions
... a. If the container was sealed quickly, what would you expect to happen to the pressure inside the container as the reaction proceeds? 12. Powdered magnesium oxide is added to a container of carbon dioxide gas. a. State the oxidation number of each element before and after the reaction. ...
... a. If the container was sealed quickly, what would you expect to happen to the pressure inside the container as the reaction proceeds? 12. Powdered magnesium oxide is added to a container of carbon dioxide gas. a. State the oxidation number of each element before and after the reaction. ...
Chemical Changes and Structure Homework Booklet
... 12Mg are two different kinds of magnesium atom. a. What word is used to describe these types of atoms? b. Explain why they can be regarded as atoms of the same element? c. The relative atomic mass of magnesium is 24.3. What does this tell you about the relative amounts of each atom? An atom has atom ...
... 12Mg are two different kinds of magnesium atom. a. What word is used to describe these types of atoms? b. Explain why they can be regarded as atoms of the same element? c. The relative atomic mass of magnesium is 24.3. What does this tell you about the relative amounts of each atom? An atom has atom ...
Electrolysis
... that is required by the Board, and the decision to use them lies with the individual teacher. Whilst every effort is made to ensure the accuracy of the content, OCR cannot be held responsible for any errors or omissions within these resources. © OCR 2017 - This resource may be freely copied and dist ...
... that is required by the Board, and the decision to use them lies with the individual teacher. Whilst every effort is made to ensure the accuracy of the content, OCR cannot be held responsible for any errors or omissions within these resources. © OCR 2017 - This resource may be freely copied and dist ...
Chapter 4 Aqueous Reactions and Solution Stoichiometry
... HI, HNO3, HF, HBr (a). HF, HBr (b).HI, HNO3, HBr (c). HI, HF, HBr (d). HNO3, HF, HBr 7. Which hydroxides are strong bases? Sr(OH)2, KOH, NaOH, Ba(OH)2 (a). KOH, Ba(OH)2 (b). KOH, NaOH (c). KOH, NaOH, Ba(OH)2 (d) Sr(OH)2, KOH, NaOH and Ba(OH)2 8. A neutralization reaction between an acid and a metal ...
... HI, HNO3, HF, HBr (a). HF, HBr (b).HI, HNO3, HBr (c). HI, HF, HBr (d). HNO3, HF, HBr 7. Which hydroxides are strong bases? Sr(OH)2, KOH, NaOH, Ba(OH)2 (a). KOH, Ba(OH)2 (b). KOH, NaOH (c). KOH, NaOH, Ba(OH)2 (d) Sr(OH)2, KOH, NaOH and Ba(OH)2 8. A neutralization reaction between an acid and a metal ...
CHEM 1405 Practice Exam #2 (2015)
... A) combination B) decomposition C) double replacement D) neutralization 18) Which of the following is evidence for a chemical reaction? A) A gas is detected. B) A precipitate is formed. C) A flame is observed. D) all of the above 19) Which of the statements below best describes the following reactio ...
... A) combination B) decomposition C) double replacement D) neutralization 18) Which of the following is evidence for a chemical reaction? A) A gas is detected. B) A precipitate is formed. C) A flame is observed. D) all of the above 19) Which of the statements below best describes the following reactio ...
Examples
... any sulfide reacting with an acid CO2 (Carbon dioxide) is formed from any carbonate reacting with an acid, water is also produced SO2 (sulfur dioxide) is formed from any sulfite reacting with an acid, water is also produced NH3 (ammonia) is formed from ammonium reacting with a soluble hydroxid ...
... any sulfide reacting with an acid CO2 (Carbon dioxide) is formed from any carbonate reacting with an acid, water is also produced SO2 (sulfur dioxide) is formed from any sulfite reacting with an acid, water is also produced NH3 (ammonia) is formed from ammonium reacting with a soluble hydroxid ...
Exercise #5_Chpt 2
... Exercise #10: Writing chemical equations Write balanced equations for the following reactions. Where possible include state symbols. ...
... Exercise #10: Writing chemical equations Write balanced equations for the following reactions. Where possible include state symbols. ...
Predicting Reactions
... vapor. There is no need to store the bromine water since it is easily prepared. It may also be helpful to mix the solutions in a clear glass bottle allowing your students to view the color of elemental bromine. ...
... vapor. There is no need to store the bromine water since it is easily prepared. It may also be helpful to mix the solutions in a clear glass bottle allowing your students to view the color of elemental bromine. ...
CHEM 1405 Practice Exam #2
... A) Solid sodium carbonate is heated to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to sodium oxide and carbon dioxide. C) Sodium carbonate decomposes to sodium oxide and carbon dioxide gas. D) Sodium carbonate is heated to give sodium oxide and carbon dioxide. 20) ...
... A) Solid sodium carbonate is heated to give solid sodium oxide and carbon dioxide gas. B) Sodium carbonate decomposes to sodium oxide and carbon dioxide. C) Sodium carbonate decomposes to sodium oxide and carbon dioxide gas. D) Sodium carbonate is heated to give sodium oxide and carbon dioxide. 20) ...
03 Inorg. drugs with acid-base prop. IOC of С,Al, Ba,Ag
... Practically insoluble in water and in organic solvents. It is very slightly soluble in acids and in solutions of alkali hydroxides. IDENTIFICATION эA. (BrPh, SPU, add. 1). Boil a suspension of 0.2 g with 5 ml of a 500 g/l solution of sodium carbonate R for 5 min, add 10 ml of water R, filter and aci ...
... Practically insoluble in water and in organic solvents. It is very slightly soluble in acids and in solutions of alkali hydroxides. IDENTIFICATION эA. (BrPh, SPU, add. 1). Boil a suspension of 0.2 g with 5 ml of a 500 g/l solution of sodium carbonate R for 5 min, add 10 ml of water R, filter and aci ...
unit 4 practice
... 23. Consider the following equilibrium system 2 H2S(g) 2 H2(g) + S2(g) At equilibrium a 2.0 L reaction vessel contained 1.2 x10-‐3 mol of H2S, 7.2 x10-‐6 mol H2, and 6.0x10-‐2 mol S2. ...
... 23. Consider the following equilibrium system 2 H2S(g) 2 H2(g) + S2(g) At equilibrium a 2.0 L reaction vessel contained 1.2 x10-‐3 mol of H2S, 7.2 x10-‐6 mol H2, and 6.0x10-‐2 mol S2. ...
introduction to matter
... allowing a substance to change from liquid to gas but the identity and composition of the substance remaining the same. Chemical properties are properties that can be observed by changing a substance into another substance. Examples include: (1) a metal’s resistance to rusting which is determined by ...
... allowing a substance to change from liquid to gas but the identity and composition of the substance remaining the same. Chemical properties are properties that can be observed by changing a substance into another substance. Examples include: (1) a metal’s resistance to rusting which is determined by ...
AQA GCSE Chemistry My Revision Notes
... barium chloride solution acidified with dilute hydrochloric acid dilute hydrochloric acid silver nitrate solution acidified with dilute nitric acid sodium hydroxide solution. The technician made up aqueous solutions of the unknown compounds and did some tests to confirm their identity. Descr ...
... barium chloride solution acidified with dilute hydrochloric acid dilute hydrochloric acid silver nitrate solution acidified with dilute nitric acid sodium hydroxide solution. The technician made up aqueous solutions of the unknown compounds and did some tests to confirm their identity. Descr ...
10th CBSE {SA - 1} Revision Pack Booklet - 3
... Thus, hydrated copper sulphate crystals are blue in colour and have formula CuSO4 .5H2 O www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 ...
... Thus, hydrated copper sulphate crystals are blue in colour and have formula CuSO4 .5H2 O www.pioneermathematics.com S.C.O. - 326, Sector 40–D, CHD. Phone: 9815527721, 4617721 ...
CHEMISTRY 110 LECTURE
... H2O(l) H2(g) H2S(g) CO2(g) 3. Write the net-ionic equation by eliminating all spectator ions. (The unreacting species) The net-ionic equaiton must be in the simplest ratio possible ...
... H2O(l) H2(g) H2S(g) CO2(g) 3. Write the net-ionic equation by eliminating all spectator ions. (The unreacting species) The net-ionic equaiton must be in the simplest ratio possible ...
Mr. Dehne AP Chem Name: ___________ Date: Per#: ___ AP
... 32. Using the general solubility rules given in the notes, name three reagents that would form precipitates with each of the following ions in aqueous solution. Write the net ionic equation for each of your suggestions. a. chloride ion c. iron (III) ion e. mercury (I) ion Hg22+ b. calcium ion d. su ...
... 32. Using the general solubility rules given in the notes, name three reagents that would form precipitates with each of the following ions in aqueous solution. Write the net ionic equation for each of your suggestions. a. chloride ion c. iron (III) ion e. mercury (I) ion Hg22+ b. calcium ion d. su ...
MATERIAL SAFETY DATA SHEET - Dynamic Aqua
... atmosphere. Notify applicable government authority if release is reportable or could adversely affect the ...
... atmosphere. Notify applicable government authority if release is reportable or could adversely affect the ...
X012/11/02
... (b) Many dishwasher tablets contain sand which can help to remove food deposits. Sand contains the covalent compound silicon dioxide. What type of structure does silicon dioxide have? (You may wish to use page 6 of the data booklet to help you.) ...
... (b) Many dishwasher tablets contain sand which can help to remove food deposits. Sand contains the covalent compound silicon dioxide. What type of structure does silicon dioxide have? (You may wish to use page 6 of the data booklet to help you.) ...
专 业 英 语 复 习 题 整理人：王华敏 化合物的英文命名 Nomenclature
... ionization energy of oxygen is lower than that of nitrogen. ...
... ionization energy of oxygen is lower than that of nitrogen. ...
Homework Booklet Unit 1 Feb14
... (c) Name the two pollutant gases changed by the catalyst and describe what they are changed into. 4. Explain why solid citric acid does not conduct electricity yet when it dissolves in water it does conduct. 5. Electrolysis of acids can be used to confirm the presence of hydrogen ions. (a) At which ...
... (c) Name the two pollutant gases changed by the catalyst and describe what they are changed into. 4. Explain why solid citric acid does not conduct electricity yet when it dissolves in water it does conduct. 5. Electrolysis of acids can be used to confirm the presence of hydrogen ions. (a) At which ...
Sodium hydroxide
Sodium hydroxide (NaOH), also known as lye and caustic soda, is an inorganic compound. It is a white solid and highly caustic metallic base and alkali salt which is available in pellets, flakes, granules, and as prepared solutions at a number of different concentrations. Sodium hydroxide forms an approximately 50% (by weight) saturated solution with water.Sodium hydroxide is soluble in water, ethanol and methanol. This alkali is deliquescent and readily absorbs moisture and carbon dioxide in air.Sodium hydroxide is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner. Worldwide production in 2004 was approximately 60 million tonnes, while demand was 51 million tonnes.