how we can isolate calcium?
415111
It is done with an apparatus called a Downs Cell. It's a specially designed electrochemical cell which can electrolyze molten CaCl2 to produce elemental Ca and Cl2. It's also the same apparatus used to produce metals such as Na and Mg.
209656
Calcium/ rust buildup. First, you can try ordinary vinegar. Take off the head and soak the piece in vinegar overnight. That may dissolve the calcium. If not, try CLR or similar product, they work wonders!
12946
Lime is calcium carbonate, which is what we use to make bone.  It is available from a wide variety of plants.\n\nCalcium doesn't just make bones, it is essential for other biological processes.  This is why you can lose bone mass - if you get low on calcium, the body will leech it from the bones for more important functions.\n\nIn chicken eggs, not only does the shell protect the embryo, the calcium is leeched from the shell to provide calcium for the growing chick.  By the time the chick is ready to hatch, the shell is thinned down enough for the chick to get through.
280564
calcium is maintaind in the blood by the action of parathyroid hormone and calcitrol\nReceptors monitor the level and if it is low, parathyroid acts on bone to release calcium and increase intestinal absorption, if it is high the hormones act on bone to bind more calcium and the gut to stop absorbing it
495941
We have no idea what data you [we] have to work with here.\n\nWhat did you do in your lab?\n\nI assume you had a saturated solution of Ca(OH)2 which you then titrated with a stron acid like HCl.  You then should have recored the volume and concentration of the acid required to neutralize the Calcium Hydroxide.\n\nWrite out the chemical reaction between Ca(OH)2 and your acid, find the mole ratio between the moles of acid used and the moles of OH- in solution, and solve.
1041301
Common table salt has other ingredients in it including sugar. It is not close to pure.   It would take very efficient purification.
259576
calcium deposits...drink more milk.
430162
The second one.  The other three contains salts of calcium.
417834
Something that requires water in order to become a true Base\n\ne.g. CaO + H2O -> Ca(OH)2
559690
YES,LOOKING AT A CARTON NOW , 1/2 gallon , serv. per container 8, Calcium is 30%.\nBut that is enriched soy milk, there are several different kinds, just read the container , but yes there is calcium.
69053
The best calcium is that which occurs naturally in the foods we eat.  Brocolli, spinach, almonds, milk, cheese are great examples of calcium sources.  \n\nThe problem with supplements is their efficacy- some brands are more readily absorbed than others, and absorption can depend greatly on your individual body makeup.  Supplements are also an expensive way to admit you don't eat your veggies.
349631
CaSO4 (Calcium Sulfate) is soluable in everything exept for Ag2+, Ca2+, Sr2+, Ba2+, and Pb2+. i am not going to lie to you and tell u that i know y this occurs but if i were to guess i would say that it was because CaSO4 is an ionic compound.
319247
it is a calcium deposit. it is quite normal. a small procedure can remove it.
760162
Milk and cheese are very good sources of calcium
378767
You would complete dissolve it in strong acids and then separate the metals by qualitative analysis techniques.  Not simple and very expensive.
968530
A lot of silly answers here. It does reac slightly to make calcium sulphate. Calcium sulphate is only slightly soluble and coats the limestone making a barrier between the limestone and the acid.
511902
proteins and calcium carbonate.