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Calcium
Calcium is a chemical element with the atomic number 20 and symbol Ca. It is an alkaline earth metal and one of the most abundant metals in the Earth’s crust. Calcium is also essential for living organisms, both as a catalyst for cellular processes and as a component of shells, bones, and teeth.
500 Questions
What is the difference between calcium carbonate and calcium phosphate?
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CaCO3 = calcium carbonate
Ca3(PO4)2 = calcium phosphate
Why is calcium a Solid?
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Calcium can be solid, liquid or gas. At room temperature it happens to be a solid.
What does calcium do for children?
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It is important to a child for bone and teeth development.
Does calcium chloride react with ammonia solution?
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CaCl2 (aq) + 2NaOH(aq) = Ca(OH)2(s) + 2NaCl(aq)
Calcium hydroxide is produced commercially by treating lime with water:
What food is the most calcium dense?
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Thank you for your question.
The highest nutritional source of calcium is found in: Sesame Seeds.
They contain 975mg per 100g serving. which is 98% of the Daily Value.
Make sure they are whole (Unhulled) and not Decorticated.
This is Because 93.8% of the Calcium is found in the hull of the Sesame seed.
For Comparison:
1 cup (244grams) of Whole Cows Milk contains 276mg of Calcium. (28% of the Daily Value)
1 cup (244grams) of Whole Sesame Seeds contains 1404mg of Calcium (140% of the Daily value)
(Source: http://www.nutritiondata.com)
-If i find a higher source of calcium, this answer will be updated-
What is the formula for the compound that forms from calcium and hydrogen phosphate?
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What are some calcium rich food that would be good to eat?
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Some calcium rich food that would be good to eat would include most foods under the dairy group, such as milk and yogurt. Some other calcium rich foods include broccoli, spinach, almonds, sardines, and oranges.
What is the reaction of hydrogen chlorine and calcium?
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The calcium hydride (CaH2) is obtained.
How do you clear calcium deposits from a toilet?
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Pour white vinegar into the basin in order to stop calcium build up in your sump pump. The vinegar breaks up the calcium so it does not cause problems. Use one gallon of vinegar. You should do this as part of yearly maintenance.
Calcium and oxygen?
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Calcium (CAS NO.7440-70-2) is used as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium,as a deoxidizer, desulfurizer, or decarbonizer for various ferrous and nonferrous alloys and used as an alloying agent used in the production of aluminium, beryllium, copper, lead, and magnesium alloys. It is used in the making of cements and mortars to be used in construction.,in the making of cheese, where calcium ions influence the activity of rennin in bringing about the coagulation of milk.
Oxygen (CAS NO.7782-44-7) is used for primary metals manufacturing, chemicals manufacturing, oxidation processes, and partial oxidation processes. The steel industry prefers to use pure oxygen rather than air in processing iron. The oxygen reacts with elemental carbon to form carbon monoxide, which is processed with iron oxide so that carbon is incorporated into the iron metal, making it much lower melting and more pliable (fusible pig iron).
Oxygen is also used medically for patients who require mechanical ventilation, often at concentrations above 21% found in ambient air.
In other oxygen applications, metal fabrication involves cutting and welding with an oxygen-acetylene torch. Chemical manufacture use includes the formation of ethylene oxide, acrylic acid, propylene oxide, and vinyl acetate. Miscellaneous uses include sewage treatment, aeration, pulp and paper bleaching, and missile fuel.
What are practical uses of calcium?
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One must be careful to distinguish between the pure metallic element called Calcium and the compound Calcium carbonate that has often been colloquially referred to as simply calcium.
- Pure calcium is a soft grey alkaline earth metal,
- In compounds it is the fifth most abundant element by mass in the Earth's crust.
Metallic calcium (the less common form in nature) is used in various commercial roles other than as nutritional supplements to support biological life. Some uses include:
- Working as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium
- Working as a deoxidizer, desulfurizer, or decarbonizer for various ferrous and nonferrous alloys
- Working as an alloying agent used in the production of aluminium, beryllium, copper, lead, and magnesium alloys
The more 'natural form' of calcium is ionically bound in 'calcium containing compounds', it serves important roles in life as well:
- Calcium, combined with phosphate to form hydroxylapatite, is the mineral portion of human and animal bones and teeth.
- Used in the making of cements and mortars to be used in construction.
Calcium hydroxide (slaked lime) is used in many chemical refinery processes and is made by heating limestone at high temperature (above 825°C) and then carefully adding water to it. When lime is mixed with sand, it hardens into a mortar and is turned into plaster by carbon dioxide uptake. Mixed with other compounds, lime forms an important part of Portland cement. - Calcium carbonate (CaCO3) is one of the common compounds of calcium. It is heated to form quicklime (CaO), which is then added to water. This forms another material known as slaked lime (Ca(OH)2), which is an inexpensive base material used throughout the chemical industry. Chalk, marble, and limestone are all forms of calcium carbonate.
- Various calcium salts are used as an alternative to sodium chloride as road salt.
- Used in the making of cheese, where calcium ions influence the activity of rennin in bringing about the coagulation of milk
Is calcium citrate a better calcium supplement than calcium carbonate?
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Calciun Carbonate and Calcium Citrate are different in that, Carbonate is not as easy to absorb as Citrate. Carbonate in not recommended for elderly folks due to a decrease in stomach acids. Citrate in more easily absorbed and can be taken at anytime, with or without food.
What are the elements present in calcium chloride?
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Calcium Iodide, CaI2, contains calcium, Ca and iodine, I.
