Test 2 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Find the combination that will give a gas as a product A. AgNO3(aq) + NaI(aq) B. HCl(aq) + Na2CO3 (aq) C. MgCl2(aq) + K2CO 3 (aq) D. CaSO4 (aq) + (NH4)3 PO4(aq) 1) A) A B) C C) B D) D 2) 2) The balanced molecular equation for complete neutralization of H2 SO4 by KOH in aqueous solution is __________. A) 2H+ (aq) + 2OH- (aq)
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NSS Chemistry Part 15 Analytical Chemistry (Structural Questions) HKCEE and HKAL Past Paper Questions 1. HKCEE 1994 Q8b A student carried out some tests on an ionic compound X which was a white solid. The results obtained were summarized in the following flow diagram: (i) Based on the above information‚ deduce the cation and anion present in X. (ii) Describe how the flame test on X can be carried out in the laboratory. (6 marks) 1 2. HKCEE 1995 Q2 In each of the following
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Unit 4: Solutions and Solubility Lesson 13 Key Questions: 42. a) Cloudy pond water – Heterogenous‚ light cannot pass though‚ can see different parts. b) Apple Juice – Solution‚ organic apple particles(solute)‚ and water(solvent). c) Rainwater – Solution‚ CO2‚ hydrogen(solute)‚ and water(solvent). d) 14-karat gold in jewelry – Heterogenous‚ light cannot pass through. Just because light can’t pass through‚ doesn’t mean it’s not a solution! Gold is a solid solution – it is different metals
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resulted in chemical change. 3. Test Solution Chemical Formula Sodium Sulphate Na2SO4 Potassium Chloride KCl Iron (lll) Nitrate Fe(NO3)3 Bottle Water H20 Tap Water H20 Well Water H20 Reagent Chemical Formula Silver Nitrate AgNO3 Barium Chloride BaCl2 Potassium Thiocyanate
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R O + 6H2O + Cr2(SO4)3 green No 1° alcohol ARMSALCEDO alanx3@yahoo.com 1 3/5/2011 EXPERIMENT EXPERIMENT 8 OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS Discussion Tollen’s Test REAGENTS: 1% AgNO3‚ 6M NaOH‚ conc. NH4OH POSITIVE FOR: aldehydes POSITIVE RESULT: silver
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Abstract: The objective of Experiment 1 was to observe some chemical changes. While observing the chemical changes in elements I also experimented with household cleaners to see how much chemical properties relate to our daily lives. Chemical changes occur all around me and I go without noticing them all the time without a second thought. This experiment opens my eyes to different chemical reactions occurring around me. This experiment also shows the importance of dilution. If I did not dilute something
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dripping some hydrochloric acid into it and see if there is bubbles that occur from a carbon dioxide release. If the resulting product does bubble you may have sodium bicarbonate in it. 2. Write the chemical equation for the reaction in well A6. AgNO3 (aq) + NaOH (aq) → AgOH(s) + NaNO3
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and recorded. In column 3 row A; two drops of HCl was combined with two drops of Phenolphthalein. In column 3 row B; two drops of NaOH was combined with two drops of AgNH3. The results were observed and recorded. In column 3 row C; two drops of AgNO3 was combined with two drops of NH3. The results were observed and recorded. Finally in column 3 row D;
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Blue Dye - Turned dark blue Blue Dye and NaOCl- Turned dark blue then aqua blue. NaOCl and KI- Turned yellow. KI and Pb(NO3)2- Cloudy yellow. NaOH and phenolphthalein- Dark pink. HCl and phenolphthalein- Clear w/ No bubbles. NaOH and AgNO3 – Olive green. AgNO3 and NH3- Clear w/ Bubbles NH3 and CuSO4- Cloudy aqua blue. Questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate
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blue with the 1 drop of HCl green/blue F. NaOCl + KI A2 rusty-yellow with 1 drop of starch black G. KI + Pb(NO3)2 B2 yellow‚ not clear H. NaOH + phenolphthalein A3 purple‚ violet I. HCl + phenolphthalein A4 clear J. NaOH + AgNO3 D3 murkey‚ brown K. AgNO3 + NH3 A4 purple‚ then cloudy white/clear after exposure to bright light pink tint L. NH3 and CuSO4 A5 cloudy dark blue Part F: Testing of Various Foods with the NaOCl + KI solution Foods Presence or Absence of Starch potato yes
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