Fill the burette with 0.005mol dm-3 potassium manganate(VII) solution. 6. Pour some of the thyme extract solution into a 250cm3 plastic beaker. 7. Using a measuring cylinder, add 50cm3 of 1.0mol dm-3 sulphuric(VI) acid to the thyme extract in the conical flask.
Cylinder was rinsed with distilled water. * * 2. 2.0 ppm standard: 2.00 mL of 10.0 ppm phosphate solution was placed in a 25 mL graduated cylinder and diluted to exactly the 10 mL mark with distilled water then poured into a plastic cup labeled 2. Cylinder was rinsed with distilled water. * 3.
* 5ml of distilled water was poured down the sides of the beaker, swirled and poured into the funnel. * The filter paper containing the precipitate was allowed to dry and then weighed. 1.7g/1.4g * The weight of the filter paper was subtracted (1.1g/0.7g) to give the actual yield of calcium carbonate (0.6g/0.7g). Observations: * When CaCl2 and Na2CO3 were mixed, a white precipitate was noted immediately. * Residual precipitate was observed on the beaker when filtering.
The second experiment, procedure 1, combined [Co(NH3)5 (H2O)]Cl2 (0.0060M, 1.52g) and (25mL) of distilled water to an 125mL Erlenmeyer flask. The flask was gently heated (dial 5-6) and stirred until all the compound was dissolved. The heated solution was then vacuum filtered through a fritted funnel and the filtrate was cooled in an ice bath until the
The reason why we're determining if their was a chemical reaction is to identify if it is exothermic or endothermic. How exactly we do is that ionic compounds dissolve in water ,or HCl, to break down the ionic bonds. With these ions it attaches to the water molecules and
Title : Application of Le Chatelier’s Principle to some solution reactions. Aim : To investigates the application of Le Chatelier’s Principle to some solution reactions. Apparatus : 5 mL measuring cylinder, test tubes, 50 mL beaker, Bunsen burner, dropper. Materials : 0.1 mol L⁻¹ potassium chromate(VI) solution [K₂CrO₄], 0.1 mol L⁻¹ potassium dichromate(VI) solution [K₂Cr₂O7 ], (0.2 mol L⁻¹ and 1.0 mol L⁻¹) hydrochloric acid solution [HCL], 0.2 mol L⁻¹ sodium hydroxide solution (NaOH), cobalt (II) chloride hexahydrate peasized [CoCl₂.6H₂O], distilled water. Introduction : Part A : Chromates and dichromates are salts of chromic and dichromic acid.
Procedure Preparing of Medium Agar Materials and apparatus * Distilled water * Nutrient agar powder * Autoclave machine * Petri dish * Hot plated * Conical flask Procedure 1. 500 ml of agar solution was prepared by using 500 ml distilled water and 10 g of nutrient agar powder. 2. Both distilled water and nutrient agar powder was poured into conical flask. 3.
This solution was added drop wise to the stirred ethanolic solution of benzophenone at room temperature. After all the sodium borohydride being added, the mixture was stirred for a further 10min. Meanwhile, ice water (10ml) was mixed with concentrated hydrochloric acid (1ml) in 50ml beaker. To this the mixture of sodium borohydride and benzophenone was poured slowly into the beaker. The precipitate was collected using suction filtration and washed with 2 x 5ml portions of water.
DNA Extraction Aim: To extract DNA from a carrot using house hold products. Method: * Step 1 – Pour 60 ml (¼ cup) of clear alcohol into a glass. Place the glass into the bowl of iced water to chill, then set aside. * Step 2 – Pour 120 ml (½ cup) of tap/distilled water into the measuring cup with the salt. Add 30 ml (2 tablespoons) of clear detergent and mix carefully until the salt is dissolved.
They were glucose, water, lemon juice, Coca Cola, egg batter, lemon-lime soda, diet lemon-lime soda, Kraft Italian dressing, skim milk and butter. The positive control was the glucose and the negative control was the water. Twenty drops of each sample of substance was added to the test tubes (in all there were 10 test tubes). After the solutions were added in their own test tube, 20 drops of Benedict’s reagent was added. Each individual test tube was placed in boiling water and removed after 5 minutes to test if