carbonate and solution of hydrochloric acid C: Room temperature (23oC) Mass of calcium carbonate (5.0g) Concentration of hydrochloric acid (6.0M) Amount of hydrochloric acid (20ml) Time for chemical reaction (360sec) Prepare solid calcium carbonate (5.0g for each trial), solution of hydrochloric acid (6.0M of 20ml for each trial), a pressure sensor, Lab Quest mini, temperature sensor, hot plate, a rubber stopper, and a Erlenmeyer flask. Measure 20 ml of hydrochloric acid and pour into the Erlenmeyer
Aim of the Experiment: To investigate volumetrically the percentage composition of calcium carbonate in an egg shell, using back titration and to analyze the sources of error to evaluate the results of the experiment. Equations: Part A. C6H4COOH.COOK + NaOH C6H4COOK.COONa Part B. NaOH + HCl NaCl + H2O Part C. CaCO3 + 2HCl CaCl2 + CO2 + H2O Qualitative Observations: The egg shell was broken down into small piece in mortar and pestle, then it was added in hydrochloric
Five experiments were performed in 500 ml stirred conical flasks. Fifty millilitres (50 ml) of the bacterial culture (from a chemostat running at 30°C and 48 h residence time) was added to 200 ml of growth medium in each flask. The flasks were then loosely covered
uniformity, content uniformity of fast dissolving oral film and 15 minute cumulative release of fast dissolving oral film. The selected independent variables in process optimization were temperature, stirring speed and stirring time.Then, single factor experiment was taken for determination of pressure and cycle of high pressure homogeneous. Suspension intermediate with a mean particle size of (1.45±0.11)μm and a particle size uniformity of (0.681±0.052)was
the formation of an electrolyte-xylene emulsion in the cathode layer. In the layer of this emulsion, the synthesis and simultaneous extraction of CdSe nanoparticles take place. Being extracted into xylene, they do not yield anymore to action of the acid medium in the electrolyte. Since xylene is a nonpolar solvent, and coagulate very little, if at all. For small nanoparticles, xylene is stabilizing additive, whereas larger nanoparticles precipitate within some time after extraction. This may be due
Rusting is a destructive impact of a material due to its reaction to environment. It becomes the colossal problem because of the consequences that people are facing nowadays. In addition to our daily livelihood with this form of degradation, rusting causes the plant to shutdown, loss and contamination of products, costly maintenance, wastes of valuable resources and reduction of efficiency. Moreover, the formation of rust increases the volume of the initial iron mass that causes failure of machines
Rebound hammer test (Schmidt Hammer) is used to determine rapid compressive strength of concrete. Hammer consists of spring controlled mass slides on plunger. When the plunger of rebound hammer is pressed on surface of concrete, a spring controlled mass with a constant energy is made to hit concrete surface to rebound back. Rebound hammer is used to measures surface of hardness of concrete which is shown on given scale on rebound hammer. The scale shows rebound hammer and strength of concrete and
different groups within the classroom then proceeded to do the experiment again but with varying substances and quantities. The control experiments were conducted with the same procedure, with these six combinations of substances: 10g of calcium chloride with 20mL of phenol red solution, 10g of calcium chloride with 8mL of phenol red solution, 12g of sodium bicarbonate with 20mL of phenol red solution, 10g of
The purpose of this experiment was to find out at which level of pH the enzyme catalase would produce the highest amount of oxygen while it was breaking down the hydrogen peroxide. The hypothesis which was formed by the experimenter states that if the pH of cow liver is lowered by different amounts of hydrochloric acids, varying from 0 drops, 5 drops, 10 drops, 15 drops, and 20 drops, then the amount of oxygen that is produced from the catalase enzyme suspension would be the greatest when the pH
Purpose: The purpose of this experiment is to find out what kind of gases we can produce using different reactions such as manganese dioxide mixed with hydrogen peroxide, hydrochloric acid mixed with sodium hydrogen carbonate, and manganese ribbon mixed with hydrochloric acid. In this experiment we used oxygen, hydrogen, and carbon dioxide etcetera. Oxygen is fundamental in burning objects. 20% of our air has oxygen in it thus why we have fire. When hydrogen is inflamed the air the oxygen