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The mass of a sample containing calcium might get larger after a reaction due to the calcium reacting with elements or compounds in the environment to form new substances that add weight to the sample. This could include the addition of oxygen, sulfur, or other elements to the calcium during the reaction.
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Can the calcium concentration of a sample increase over time?
Yes, the calcium concentration of a sample can increase over time due to various factors such as dissolution of calcium-containing compounds, precipitation of calcium salts, or biological processes that release calcium into the solution. Factors like pH, temperature, and the presence of other ions can also influence the solubility and concentration of calcium in a sample over time.
What is pure sample of calcium?
A pure sample of calcium is a silver-white metal that is highly reactive and not typically found in its elemental form in nature. It is commonly found in compound form, such as calcium carbonate in rocks like limestone, or in calcium phosphate in bones and teeth.
Why ammonium oxalate is added in calcium carbonte solution?
ammonium oxalate is added to calcium carbonate because in the reaction between the two a crystal is formed that contain the Ca+2 ion. This is useful because if you have a sample of sodium carbonate with an unknown molarity you can use the oxalate to extract this calcium and determine what the molarity of the unknown solution was
Calcium is bound by what tube additive?
Calcium is bound by the tube additive ethylenediaminetetraacetic acid (EDTA) during sample collection to prevent coagulation and preserve the integrity of the sample for testing.
What happen when borax is heated with CaO?
When borax is heated with CaO, the borax is decomposed to form sodium metaborate and calcium metaborate. This reaction is usually used in analytical chemistry to detect the presence of boron in a sample.
What kind of reaction take place between the calcium and EDTA?
The reaction between calcium and EDTA is a complexation reaction in which the EDTA molecule binds to the calcium ion, forming a stable, water-soluble complex. This reaction is used in titrations to determine the concentration of calcium in a sample.
What type of argument has a premise that describes the property of a sample and whose conclusion extends that premise to a larger class containing that sample or to an item outside the sample?
Deductive
Can the calcium concentration of a sample increase over time?
Yes, the calcium concentration of a sample can increase over time due to various factors such as dissolution of calcium-containing compounds, precipitation of calcium salts, or biological processes that release calcium into the solution. Factors like pH, temperature, and the presence of other ions can also influence the solubility and concentration of calcium in a sample over time.
What is ca in FTIR?
In Fourier Transform Infrared Spectroscopy (FTIR), "ca" typically refers to "calcium," which can be a component of the sample being analyzed. FTIR is used to identify molecular structures based on vibrational transitions, and if calcium compounds are present, they may show characteristic absorption peaks in the IR spectrum. Understanding these peaks can help in the qualitative and quantitative analysis of samples containing calcium or calcium-containing compounds.
What is a negative reaction for Benedict's?
A negative reaction for Benedict's test would be no color change or a very faint color change after adding the Benedict's reagent to a sample containing reducing sugars. This would indicate that there is a low concentration or absence of reducing sugars in the sample.
How do you make pure samples of caclium?
The most straightforward way to make a pure sample of calcium is to electrolyze a molten calcium salt with an "inert" cathode such as platinum. Considerable care is required to prevent reaction of pure calcium with the ambient atmosphere.
What is pure sample of calcium?
A pure sample of calcium is a silver-white metal that is highly reactive and not typically found in its elemental form in nature. It is commonly found in compound form, such as calcium carbonate in rocks like limestone, or in calcium phosphate in bones and teeth.
Sample of a substance containing copper?
copper oxide...
What is the purpose of using lime water during the reaction of the acid sample with marble chip?
Lime water is used during the reaction of the acid sample with marble chips to test for the presence of carbon dioxide. If carbon dioxide is produced during the reaction, it will react with the lime water to form a white precipitate of calcium carbonate, confirming the presence of carbon dioxide in the acid sample.
Why ammonium oxalate is added in calcium carbonte solution?
ammonium oxalate is added to calcium carbonate because in the reaction between the two a crystal is formed that contain the Ca+2 ion. This is useful because if you have a sample of sodium carbonate with an unknown molarity you can use the oxalate to extract this calcium and determine what the molarity of the unknown solution was
How can limestone testing as caco3?
To test limestone for its calcium carbonate (CaCO3) content, you can use an acid test. By adding a few drops of dilute hydrochloric acid to a sample of limestone, a reaction will occur if it contains calcium carbonate, producing bubbles of carbon dioxide gas. The intensity of the reaction can indicate the purity of the limestone.
When using the distribution of sample mean to estimate the population mean what is the benefit of using larger sample sizes?
The variance decreases with a larger sample so that the sample mean is likely to be closer to the population mean.
