ingredients: Complex Sodium Phosphates and sodium carbonate‚ Nonionic surfactant and chlorine bleach‚ sodium silicate‚ sodium sulfate. (D) What do these ingredients do in the mixture? When tested as a whole can be considered an eye irritant. Complex Sodium Phosphates and sodium carbonate are used as a water softener. Nonionic surfactant and chlorine bleach is a cleaning and water spot preventive agent. Sodium silicate is a dishwasher and china protection agent. Sodium sulfate has multiple jobs
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Hydrochloric acid‚ HCl‚ 6 M‚ 125 mL* Nitric acid‚ HNO3‚ 6 M‚ 125 mL* Ammonia‚ NH3‚ 6 M‚ 125 mL* Sulfuric acid‚ H2SO4‚ 6 M‚ 125 mL* Acetic acid‚ CH3COOH‚ 6 M‚ 125 mL* Sodium chloride‚ NaCl‚ 0.2 M‚ 100 mL* Sodium carbonate‚ Na2CO3‚ 0.2 M‚ 100 mL* Sodium hydroxide‚ 6 M‚ 100 mL* Sodium sulfate‚ Na2SO4‚ 0.2 M‚ 100 mL* Sodium nitrate‚ NaNO3‚ 0.2 M‚ 100 mL* Barium chloride‚ BaCl2‚ 0.1 M‚ 100 mL* Barium hydroxide‚ Ba(OH)2‚ 5 g* Potassium thiocynate‚ KSCN‚ 0.1 M‚ 100 mL* Potassium ferrocyanide
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Mr. Bunsen’s Rf calculations were the closest to the Rf calculations of the unknown. In our sodium hydroxide solution the compounds that were chromatographed were separated the furthest and produced Rf calculations for all of the suspects except Ms. Buchner. Changing the solvent allowed us to have a better resolution of the separated components. Acetic acid separation for the samples were very small sodium chloride solution was also similar to Acetic acid. Conclusion The unknown of NaCl and Acetic
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level 5070/31 CHEMISTRY Paper 3 Practical Test October/November 2010 CONFIDENTIAL INSTRUCTIONS *4711088250* Great care should be taken to ensure that any confidential information given does not reach the candidates either directly or indirectly. The Supervisor’s attention is drawn to the form on page 7 which must be completed and returned with the scripts. If you have any problems
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the reaction of aluminum sulfate and sodium hydroxide contains which of the following species? a) 3Al3+(aq) b) OH–(aq) c) 3OH–(aq) d) 2Al3+(aq) e) 2Al(OH)3(s) ANS: c) 3OH–(aq) PAGE: 4.6‚8 6. Which of the following is a strong acid? a) HF b) KOH c) HClO4 d) HClO e) HBrO ANS: c) HClO4 PAGE: 4.2 7. Which of the following is not a strong base? a) Ca(OH)2 b) KOH c) NH3 d) LiOH e) Sr(OH)2 Ans: c) NH3 Page: 4.2 8. When sodium chloride and lead(II) nitrate react
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14. Stirring rod 15. Test tube rack 16. Graduated cylinders 17. Funnel‚ filter paper‚ and holder for funnel B. Procedure: 1. Equilibrium in a Saturated Solution You will investigate the equilibrium in saturated sodium chloride solution: NaCl(s) (( Na+(aq) + Cl-(aq) Pour some solid NaCL into a test tube and fill the tube about ¾ full of distilled water. Cork and shake to form a saturated solution. If all the NaCl dissolves‚ pour some additional
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1M = 5.105g = 0.1N | Potassiun hydrogen iodate KH(IO3)2‚ FW = 389.92‚ Eq. 73.07g/l 250ml 0.1M = 9.75g = 0.1N | Sodium carbonate Na2CO3‚ FW = 106‚ Eq. =53g/l 250ml 0.05M = 1.325g = 0.1N | Sodium hydroxide NaOH‚ FW = 40‚ Eq. = 40g/l 250ml 0.1M = 1.0g = 0.1N 1 liter 0.1M soln = 4g = 0.1N | Sodium oxalate Na2C2O4‚ FW = 134.00‚ Eq. =134g/l 250 0.1M = 3.35g = 0.1N | Sodium tetraborate NaB4O7.10H2O‚ FW = 381.37‚ Eq. =190g/l 250ml 0.05M = 4.762g =0.1N | Succinic acid HO2CCH2CH2CO2H
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SOAP & DETERGENT I) Definition of Soap o Soap are sodium or potassium salts of long-chain carboxylic acids o The general formula of a soap : RCOO Na / RCOO K • R is an alkyl group which contain 12 to 18 carbon atoms. II) The history of soap manufacturing. ▪ Solvay Process - Carbon dioxide ( obtained from heating CaCo ) is passed into concentrated NaCl solution which is saturated with ammonia . NaCl +NH +H
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GCSE CHEMISTRY High Demand Questions THE PERIODIC TABLE QUESTIONSHEET 1 The boxes represent particles of different gases. One box shows the particles of elements in group 0 (group 8). A (a) (i) B C D What name is given to group 0 (8) elements? (ii) Name two elements from group 0. ......................................................................................................................................................................... [2] (b) (i) Which box
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Check out this science tutorial to learn how to make a bar of soap out of guava leaf extract‚ which was made by Dragonknight15 and fellow peers for their 3rd year chemistry class. This guava-infused soap actually helps clear up acne. You’ll need sodium hydroxide‚ guava leaves‚ containers‚ and lavender scent.In our personal experience‚ the hardest part about a science investigatory project is simply coming up with a good idea. And we suggest that for your investigatory project you find a topic
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