Title : Preparation of a standard solution Aim To prepare a standard solution of potassium hydrogenphthalate which will later be used to standardize sodium hydroxide solution‚ NaOH. Research question How does different molarity of potassium hydrogen phthalate solution which is prepared by dilution process influence the volume of sodium hydroxide‚ NaOH used during titration process until the colourless phenolphthalein indicator solution turns pink where the volume of potassium hydrogenphthalate used
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case Phenolphthalein‚ is to be observed. I then proceeded to Pour and Measure 9.9 mL of 0.5 Sodium Hydroxide Solution‚ taking care to allow a few drops of the Sodium Hydroxide Solution to drip into the Beaker‚ in order to Ensure a More Accurate Reading of the Volume of Solution Used Once the Experiment was Preformed. Once the Beaker was rinsed with Distilled water and the Initial Volume of Sodium Hydroxide was Recorded‚ the Experiment proceeded by Pouring and Measuring 5 mL of President’s Choice Vinegar
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Precipitation of Copper Hydroxide NaOH solution description: The Sodium Hydroxide liquid was transparent‚ homogenous‚ and blue in colour. Notes and observations on the reaction: When the sodium hydroxide was added‚ the solution got a lot darker and had a slight increase in viscosity. It also became heterogeneous as small blue specks were forming and sticking to the glass stirring rod. generating some heat- exothermic reaction‚ chemical reaction‚ copper hydroxide was converted to the
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Concentration of Hydrochloric Acid in a Given Solution by ARAKA BRAMWEL MBOGO EN251-0221/2010 TITLE: STANDARDIZATION and DETERMINATION OF THE CONCENTRATION OF HYDROCHLORIC ACID PRESENT IN A GIVEN SOLUTION Aims: To be able to standardize Sodium Hydroxide (NaOH) solution using a standard solution of Oxalic acid. To be able to prepare standard solutions. To determine the strength of a given solution of Hydrochloric acid (HCl) To analyze errors that occur during standardization experiments.
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Rinse skin with lots of cool water if splashed with chemical and report any spills to the teacher immediately. Source: Nelson Chemistry 11 (2010) ACID BASE TITRATION Purpose: To determine the concentration of solution of sodium hydroxide by acid-base titration and analyse the shape of a titration curve. . Pre-Lab: / 11 I /8 K/U / 5 C 1) What colour is the indicator phenolphthalein in an acidic solution and in a basic solution? (2 K/U) Phenolphthalein
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experiment were concentrated hydrochloric acid‚ sodium hyrdoxide‚ sodium carbonate‚ potassium acid phthalate and phenolphthalein as indicator. The pieces of glassware that were used to perform this experiment were volumetric flasks‚ Erlenmeyer flasks‚ beakers‚ volumetric pipette‚ burette‚ spatula and droppers. Also‚ the pieces of equipment that were used were analytical balance‚ top-loading balance and hot plate. Preparation of 250 mL 1.0 M sodium hydroxide solution (from solid) The amount of NaOH
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Results : Calculation : Part A Molecular weight of 1M of NaOH = 23g/mol + 16g/mol + 1g/mol = 40g/mol 1M = 40g/mol dissolved in 1L and 20g dissolved in 500ml 20g of NaOH was used to prepare 500ml of 1M NaOH. Part B Molecular weight of 1M of HCl = 35.5g/mol + 1g/mol = 36.5g/mol Specific gravity = 1.19kg/L 37% HC1 × 1.19kg/L = 0.44kg/L Convert w/v to mol/v = = 12mol/L = (12mol/L) = (1M)250ml = 20.83ml ≈ 21ml 21ml of concentrated HC1 is used to prepare 250ml of 1M of HC1. Part C For 0.1N of NaOH
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dividing. Materials: Plastic Spoon 2 Blocks of agar phenolphthalein Beaker Dissecting tray Paper towel Sodium hydroxide solution (wear eye shields) Plastic ruler Procedure: 1. Use the sharp end of the ruler to cut the agar blocks into a 3cm‚ 2cm‚ and 1cm cube (use paper towel and dissecting tray to work with blocks). 2. Place all three cubes in the empty beaker. 3. Have teacher pour sodium hydroxide solution into beaker. 4. Wait for 5 minutes without interrupting the blocks. 5. Use formulas to calculate
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lab is for me to attempt to verify the Law of Conservation of Mass. Procedure: Acid Base Neutralization 1. Using 2 modified‚ beral pipettes fill pipet an about 1/5 full of white vinegar and pipette B about 1/5 full of 1.0 M NaOh (sodium hydroxide). 2. Place the 2 Pipets on the beam balance and read and record the total mass of the 2 pipets. 3. Carefully telescope the stem of pipet A into the stem of pipette B without spilling any liquid. 4. Mix the solutions by gently
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The goal for this experiment is to determine which out of the four balanced chemical equations best represent the thermal decomposition of sodium bicarbonate. The guiding question will be answered with the outcome of the sodium bicarbonates thermal decomposition and it being plugged in into the four balanced chemical equations. John Dalton atomic theory explains two fundamental laws of chemistry which are the law of conservation of mass and the law of definite proportions. The atomic theory states
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