w w ap eP m e tr .X w Paper 3 Practical Test CONFIDENTIAL INSTRUCTIONS 5070/03 May/June 2004 Great care should be taken that any confidential information given does not reach the candidates either directly or indirectly. INSTRUCTIONS TO SUPERVISORS Teachers responsible for the examination are NOT allowed to consult the question paper before the day of the examination. However‚ they are asked to carry out a titration between solutions P and Q‚ to ensure that the concentrations
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NaNO3 Sodium Na+ Yellow Sr(NO3)2 Strontium Sr2+ Red KNO3 Potassium K+ Violet Ba(NO3)2 Barium Ba2+ Yellow-Green Cu(NO3)2 Copper Cu2+ Blue-Green LiNO3 Lithium Li+ Deep Red Ca(NO3)2 Calcium Ca2+ Orange-Red Unknown Orange-Red Conclusions
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little Swallow fall in love with? Why do the other swallows think the little Swallow has formed a "ridiculous attachment"? Why won’t the Reed go with the Swallow? Why does the little Swallow decide to leave the Reed? Why is the Happy Prince crying? Where is the Swallow going when he meets the Happy Prince? Who is the first person the Prince wants to help? What are the excuses the Swallow gives for not wanting to help the woman? Why does the boy sleep well after the Swallow leaves
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Lab Write Up Pre-Lab Questions: 1. What precipitation reaction could be used to separate and remove silver ions from a mixture containing iron (III) and zinc ions? A precipitation reaction that could be used is hydrochloric acid Ag+(aq) + HCl(aq) AgCl(s) +H+(aq) – white. 2. What precipitation reaction could be used to separate and remove iron (III) ions from the remaining mixture containing iron (III) and zinc ions? Fe3+(aq) + 3NaOH(aq) Fe(OH)3(s) + 3Na+(aq) 3. How can the presence of silver
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sodium bicarbonate throughout the world from multiple plants in the United States and Brazil. Their subsidiary in Brazil also manufactures various inorganic chemicals‚ such as sodium sulfide‚ sodium sulfite‚ sodium metabisulfite‚ barium carbonate‚ barium sulfate and barium chloride. Environmental Scan: An external scan of their environment showed that one opportunity available
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important. Rubidium is also used to make photocells. A photocell is a device for converting light energy into electrical energy. But other members of the alkali family are still preferred for this application. Barium (Ba) History Alchemists in the early middle Ages knew about some barium minerals. Smooth pebble-like
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the mass of one reactant compared to the mass of one product. Purpose: The experiment will be designed to find out the stoichiometric mole ratio of Barium Chloride and Silver Nitrate yielding a precipitate of Silver Chloride in a Barium Nitrate solution. (BaCl2 + 2AgNO3 -> Ba(NO3)2 + 2AgCl) Research Question: How will the amount of Barium Chloride and Silver Nitrate affect how much Silver Chloride is produced? Hypothesis: If there is one mole of BaCl2 in the reaction‚ then two moles
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The Justification KLTC have very strong links with software vendors and the software we are able to offer Sallow is at a reduced market price‚ we have 10 years experience in the installation sage products to small to medium size enterprises such as Sallow. We are more than able to offer discounted service and maintenance contracts which follow on from projects such as this. This Justification will discuss and reinforce why KLTC would be the best choice for Sallow printing. Timescale To install
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Hard to swallow The play" Hard to Swallow" telling the tragic story of young Catharine Dunbar. Catherine Dunbar‚ who suffers from anorexia‚ stopped eating when she was about 15 years old and died‚ after a long and hard period of pain and suffering‚ when she was about 23 years old. Who or what facts are responsible for Catherine’s anorexia? Is it her fathers’ attitude? The mothers’ approach? The medical authorities? Herself? From my view it is the fault of many events‚ and not just
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Mixing Barium titanate is a white powder that can be mix by barium carbonate and titanium dioxide. The mixture of Barium titanate can be pressed to make the piezoelectric discs. How to mix barium carbonate with titanium dioxide ? First‚ we need to use the chemical reaction formula to calculate the molar ratio of the mixture Baco3 + Tio2 -> Batio3 + Co2 Ba:137.33 Carbon:12 Oxygen:16 Ti:47.9 Total molecular mass barium carbonate = 137.33+12+48=197.33 Total molecular mass
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