• Eg 100 Lab
    ) Bromcresol green or Methyl-red indicator (in dark bottle 50-100 mL with dropper) 0.02 N HCl (Hydrochloric Acid) (Requires standardization before use) DI water (in wash bottle) Na2CO3 (s) The initial setup of the lab requires all glassware to be washed and rinsed with distilled water...
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  • Chemistry Syllabus
    nitrogen oxides are pollutant gases which contribute to acid rain; discuss some of the problems associated with acid rain; describe the industrial manufacture of sodium hydroxide and chlorine by the electrolysis of brine; recall important uses of sodium hydroxide and chlorine; describe the...
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  • martin luther
    ) 11. In a composition reaction, how many grams of sodium hydroxide are produced from 1.20 x 102 grams of sodium oxide is reacted with water? (answer: between 150 and 160 g) 12. Acetylene gas, C2H2, used in welding, produces an extremely hot flame when it burns. How many grams...
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  • Exam Review
    (Citric acid) S-Sabrina, B-Buys, O-Old, T-Tampon, P-Porn, C-CD’s Primary Standard: It is oxalic acid dehydrate, very pure crystalline solid. What it’s used for/use it: To titrate a base of unknown concentration (Standardize sodium hydroxide) How it’s made: -determine the amount of acid needed...
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  • Biology Lab
    arsenic oxide A.R. and transfer to a 400 ml beaker . Dissolve it in aqueous solution of 2g. of sodium hydroxide dissolved in 20 ml of water . Dilue to 200 ml an neutralise with 1 M hydrochloric acid using a litmus paper . When the solution under titration is still faintly acidic , remove the litmus...
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  • Profects
    should be thoroughly washed with cone. HNO3 and then with water. 2) Measures the volume of sodium thiosulphate solution hydrochloric acid and distilled water very accurately. 3) Use the same tile with the same cross mark for all observations. 4) Complete the experiment at one time only so that...
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  • Semester 1 Study Guide
    -e8UPWwS2DXZ5cI6vFb6S4Vk9AjxLX_CAipZRdUs/edit -strong acids and bases are strong electrolytes, which means they fully dissociate in water (light up) Strong Acids Strong Bases One Weak Acid One Weak Base -HCl (hydrochloric acid) -NaOH (sodium hydroxide) -HC₂H₃O...
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  • Fuckzzzzzz
    . barium chloride + nitric / hydrochloric acid NOT: barium hydroxide white precipitate / solid IGNORE: incorrect name of precipitate ALLOW: this mark if nitric acid missing from 1st marking point (c) 4Fe2+ + O2 + 4H+ → 4Fe3+ + 2H2O 1 mark for correct reactants and products; 1 mark for correct balance (d...
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  • Recovery of Elemental Copper from Copper (II) Nitrate
    recovery of elemental copper Challenge: How good and accurate a chemist are you? Given a solution of Cu(NO3)2, what percentage of elemental copper can you recover from the original solution? Materials: 1 M copper (II) nitrate 3 M hydrochloric acid 2 M sodium hydroxide 600 mL beaker 250...
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  • Chemistry Past Paper
    ........................................................................................................... (2) (Total 10 marks) Q1 2 *N29895A0220* Leave blank 2. You are provided with solutions of hydrochloric acid, sodium hydroxide, barium chloride and limewater only. In addition, you have a Bunsen burner, test tubes and dropping...
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  • IGCSE Chemistry full syllabus notes
    removed. Sodium hydroxide is used: • To purify bauxite to make alumina, so aluminium can be extracted. • To make soap • To break down wood when making paper • To manufacture chemicals Chlorine is used to make bleach, hydrochloric acid, PVC, and to sterilise water. Hydrogen is used to manufacture...
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  • Paperr
    , 4mL Ethyl alcohol, C2H5OH, 1mL Hydrochloric acid, HCL, 1 M, 4 mL Magnesium ribbon, Mg, 2-4cm strips, 2 Phenolphthalein indicator, 1 drop Sodium hydroxide solution, NaOH, 1 M, 1mL Sodium phosphate solution, Na3PO4, 0.5 M, 1mL Water, distilled Zinc, mossy, or zinc shot, Zn, 1-2 pieces Bunsen...
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  • Batch Reactor
    -esterification reaction of ethyl benzoate was studied in order to determine the reaction order and rate constant. To perform this experiment, a solution of sodium hydroxide, ethanol, and water was reacted with ethyl benzoate. Hydrochloric acid was then used to quench the reaction. Figure 1.3...
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  • Aqueous solutions
    Reaction Sodium Carbonate + Sulfuric Acid Bubbled A bit (C02) Sodium Carbonate + Hydrochloric Acid Bubbled A bit (C02) Ammonium Chloride + Sodium Hydroxide pH changed; Blue Color ( NH3) Sodium Sulfide + Hydrochloric Acid pH=0; (H2S) Conclusion The observations from the table in results...
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  • Chemistry Lab Report- Exo and Endothermic Reactions
    {reactions that occurred at a fast pace} were ‘Sodium Hydroxide [l] + Dilute hydrochloric acid [aq]’, ‘Sodium Carbonate [s] + Ethanoic Acid [l]’ and ‘Magnesium ribbon [s] + Dilute Sulphuric Acid [l]’ {mostly reactions involving strong acids + strong bases}. There was no sound or light given off in any of the...
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  • titration acid base
    base. Sodium hydroxide was standardized to 0.1035 M in three acid-base titrations of potassium hydrogen phthalate (KHP). This standardized NaOH solution was then used in a series of other titrations with acids in order to gain information about those acids. The first acid tested was hydrochloric acid...
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  • Fz1026 - Introduction to Chemical Concepts Assignment Brief
    , made up of sodium ions and hydroxide ions. It is because of these hydroxide ions which allow sodium hydroxide to be a good base. It can react with acids to form water and other salts. An example using hydrochloric acid with this base explains the salt produced...
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  • Acids, Bases, and Buffers Lab
    of the experiment. The initial pH in test tube A was 6, and the final pH was 1. This shows that when 5mL of the 0.1M hydrochloric acid was added, the pH level dropped, causing the substance in test tube A to become more acidic. The hydrochloric acid completely ionized in the water, making it as...
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  • Lab Work Chemical Changes
    that are occurring. As each reaction occurs, record the well number and observations. 1. Sodium Bicarbonate + Hydrochloric Acid 2. Hydrochloric Acid + Bromothymol blue 3. Ammonia + 1 drop Bromothymol blue 4. Hydrochloric acid + blue dye 5. Blue dye + Sodium Hypochlorite. Observe & add 1 drop...
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  • Preparation of N, N-Diethyl-M-Toluamide (Deet) and Its Identification by Ir and Nmr Spectroscopy
    and allowed to separate. The aqueous layer was discarded, and the organic layer was washed with an additional portion of 10% aqueous sodium hydroxide (2 mL), followed by a portion of 10% hydrochloric acid (2 mL). The organic layer was washed with water (2 mL), dried (Na2SO4) and evaporated to...
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