The experimental data suggest that calcium chloride (CaCl2) is the best salt to include in a hot pack because it was the most exothermic out of the tested salts. The average heat of reaction (q_(rxn,p)) of CaCl2 was calculated to be -460J. Additionally, the low cost of CaCl2 makes it an ideal choice for the widespread use of hot packs. Although the value for MgSO4 (average qrxn -443), the cost is over six times higher. Another issue to consider is the safety and toxicity of the product. According to the PubChem Open Chemistry Database calcium chloride can cause cough, sore throat and a burning sensation when inhaled (1). It can also cause redness, dry skin, and skin burns when it comes into contact with the skin. If ingested, CaCl2 can cause
Acrylamide is not a concern when food is boiled, microwaved, or steamed. The food and drug admini...
This research includes information about Alka-Seltzer and it’s correlation with chemical reactions. Many people use the chemical reaction of Alka-Seltzers to heal themselves. Heat and cold can strongly affect the speed of a chemical reaction. This science project will determine the effect heat has on the reaction between a seltzer tablet and beakers of water. The temperatures will be extremely cold, cold, room temperature, hot, and boiling water.
CaCl2 + H2O + CO2
acid. This will let me take at least five sets of results, and if the
If the HCl needs to be twice as big as the alkali it needs to be
The experiment should be carried out AWAY from the sunlight. Before beginning the experiment, we need to make sure that the benzene used in the experiment is free of toluene and water. To do this, we must put anhydrous calcium chloride into a flask o...
In our experiment we utilized the hydrate cobaltous chloride. Hydrates are crystalline compounds in which one or more molecules of water are combined with each unit of a salt. Cobalt (II) chloride hexahydrate is an inorganic compound which is a deep rose color in its hydrated form. As an inducer of
I am going to investigate the rate of reaction between calcium carbonate and. and hydrochloric acid. I will look at the various factors affecting the reaction and select one variable to change, while the others keep constant. in order to carry out a deta. Investigating Rate of Reaction Aim I am going to investigate the rate of reaction between calcium and calcium.
The Effect of Temperature of Hydrochloric Acid on the Rate of Reaction Between Hydrochloric Acid and Magnesium
The original self-contained refrigerators used sulfur dioxide as a coolant. Sulfur dioxide, being highly toxic, resulted in the occasional death due to refrigerator malfunction. Subsequently, the search for a cheap and non-toxic replacement began. General Motors sought out Thomas Midgley Jr., a world-renowned chemist at the time, and requested that he pursue research into possible alternative coolants. Midgley’s research led him to consider carbon tetrafluoride and dichlorodifluoromethane.2 Both possessed stability, a non-reactive nature, and fire extinguishing characteristics, but dichlorodifluoromethane was nominated as the preferable option because its boiling point was better suited to the mechanics of refrigerators. This new co...
Ulbig et al. [14] and [15] carried out precise measurements of heat generated when propylene glycol (PG), ethylene glycol (EG) and ethanol (ET) were diluted with water, respectively. Hubert et al. [16] showed heat absorption by infinite dilution of NaCl solution with water, and Khrenova et al. [17] showed heat absorption by infinite dilution of NaNO3 solution. Using these results, heat from mixing or dilution at 25 °C for each solution was approximated using a least squares method as follows, respectively:
Investigate the effect of changing the concentration of hydrochloric acid and the volume of carbon dioxide produced by a reaction between hydrochloric acid and marble chips (calcium carbonate). Chemistry Coursework To investigate the effect of changing the concentration of hydrochloric acid and the volume of carbon dioxide produced by a reaction between hydrochloric acid and marble chips (calcium carbonate) Planning experimental procedures Aim In this coursework I will be investigating to see how the concentration of acid affects the rate of reaction with marble chips. Hypothesis Part 1 I predict that the rate of reaction between the acid and the marble chips (calcium carbonate) will increase as the acid concentration increases. This is because in an acid solution with a greater concentration there are more particles present in the same volume of acid.
Solubility of Potassium Chlorate Solubility is the maximum amount of solid that will dissolve in 100g of solvent. The solubility of a substance depends on the type of ionic particles in it. So the solubility of each substance is different. The formula of solubility is: SOLUBILITY(g/100g)= (SOLUTE / SOLVENT) * 100 I did an experiment to prove this and find the solubility of potassium chlorate, an ionic solid.
I will not add a catalyst to my solution and I will not stir my solution. · I will use 25cm3 of hydrochloric acid. · I will use 1g of calcium carbonate.
The Effect of Temperature on the Rate of Reaction Between Hydrochloric Acid and Calcium Carbonate