Weak base

The aim of this experiment is to determine through calculations the concentration of acetic acid content within a common white vinegar. Apparatus / Materials Plastic Tray Electronic scales Sodium hydroxide Volumetric flask and lid Glass funnel Distilled water Pipette Volumetric pipette/s (5mL, 20mL) Bulb Conical flask Retort Stand Burette Burette clamp White Tile Method Place the plastic tray on the electronic scales and press tare to set the wither to zero; Weigh out 0.7993g of Sodium…

The following is a lesson sequence which modified the above experiment to promote inquiry based learning process. The aim of the experiment: Students use the change in the colour of red cabbage indicator to classify substances as either acid or base. Note: This activity may take more than one lessons. On the first lesson, students group, discuss and prepare their experiment. On the second lesson, students will have opportunities to carry out the investigation, then record, process, and evaluate…

Determining the Chemical Formula of Hydrated Copper (Ⅱ) Sulfate Using the Empirical Formula Introduction In this experiment, the molecular formula of hydrated Copper (Ⅱ) Sulfate will be determined. In order to determine the molecular formula, the empirical formula is needed which is the ratio of moles of one substance to another. In this experiment, it is the ratio of Copper (Ⅱ) Sulfate to water. CuSO₄・XH₂O The empirical formula can be determined if the moles of the compared substances…

Conclusion: I predicted that liquid A was glycerine due to a calculated density of 1.38 g/mL. However I was wrong the actual density of liquid A was 1.38 g/mL and the substance was actually corn syrup. Therefore the percent of error for the density of liquid is 1%. For liquid B I had predicted that its substance would be Glycerine due to the calculated density of 1.19 g/mL. I was incorrect for the density of liquid B which was actually 1.26 g/mL, but because the calculated and actual densities…

The two main purposes of the lab were to determine the percent by mass of acetic acid in vinegar and to determine the molar concentration of a strong acid. In both parts of the experiment a volumetric analysis was used. This is primarily the aid of volumetric glassware in order to determine specific measurements and calculations. Potassium hydrogen phthalate was used as the primary acid standard to determine the molar concentration of the sodium hydroxide solution in part one of the experiment.…

Equipment: // Sodium thiosulfate solution (of concentrations 0.1M, 0.2M, 0.3M, 0.4M). // Hydrochloric acid (2M). // 100cm3 conical flask. // 10cm3 measuring cylinder. // Dropping pipette. // Small piece of plain paper with a large X drawn with think black pen. // Stopwatch. // Goggles. Variables: Independent - The concentration of sodium thiosulfate solution (0.1M, 0.2M, 0.3M, 0.4M). Dependent - The time taken for the cross to not be seen. Control - // Concentration and volume hydrochloric…

Experiments involving chemical reactions can be performed using simple household ingredients and products such as baking soda and vinegar. When baking soda (sodium hydrogen carbonate) reacts with ethanoic acid which is found in vinegar in a 1:1 ration, the reaction will produce three different products which are water, carbon dioxide and Sodium acetate. The reaction is: NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2 In the experiment, the quantitative relationship between the two reagents which is the…

The objective of the lab was to determine the densities of known and unknown metal solids and liquids. For the liquids, initially, an Electronic Scale was placed onto Work Bench, and it was zeroed. An empty 50 mL Graduated Cylinder was placed onto the scale, weighing 54.00 grams. In increments of 10 mL. Until the volume was 30.00 Ml, 10.00 mL of water was poured into the Graduated Cylinder. In between each increase of 10.00 mL, the total volume and mass were recorded. For the known metals, the…

Experiment 1. Title: How does the amount of baking soda affect its reaction with vinegar? Aim: To find out how different amounts of baking soda (soda bicarbonate) affect the length of its chemical reaction with vinegar (acetic acid). Hypothesis: If the amount of baking soda is increased then the length of its reaction with vinegar will increase because there will be more soda bicarbonate for the acetic acid to react with. Equipment:  Baking Soda  Vinegar  5 glasses  Safety glasses …

NIMOTOP INJECTION Nimodipine 0.02% solution contains the following excipients: Ethanol 96%, Macrogol 400, sodium citrate, citric acid, Water for Injections Ph. Eur. These excipients consist of properties that aim towards the proper functionality of Nimotop. They consist of inherent stabilities that cause little or no effect in the stability of the drug and they do not have any acute or chronic toxicity. The excipients are also added into the Nimodipine 0.02% solution to enhance the biological…