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THIS WAS MY METHOD FOR MY AS Biology PRACTICAL PLAN -Add sodium citrate (1 parts to 10 parts milk) to the milk to remove calcium ions already in the milk -Add calcium chloride of different concentrations (thus different no. of calcium ions) to milk samples. -Heat to 37 degrees C in a water bath -Add rennin (an enzyme which initiates coagulation) -Observe coagulation of milk by observing the presence of "flecks" when you dip a microscope slide into the milk
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∙ 16y ago
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∙ 12y agoYou need two separate tests; one to detect the presence of calcium ions, the other to show signs of chloride ions.
To test for calcium, place your sample over a Bunsen burner (blue flame) - the flame should turn brick red in the presence of calcium.
To test for chloride ions, add nitric acid and silver nitrate to your sample. In the presence of chlorides, a white precipitate will appear in the solution.
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∙ 15y agocalcium ion: Ca2+(aq) + 2OH-(aq) ==> Ca(OH)2(s) White precipitate
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∙ 13y agoFor example with a pH paper; cations are negative charged ions with acid characteristics.
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∙ 14y agoAnalyzing it?
This was only a guess!!
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∙ 8y agoBubbling carbon dioxide calcium carbonate is formed.
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∙ 14y agoA meter with an ion selective probe
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Do alkali metals generally make anions or cations?
Cations.
Are cations metals?
cations, they all ionize to a positive charge cation=+ charge anion=- charge
What are metal cations?
Cations are ions with a positive charge. Metal cations are formed when metal loses electrons.
Where do cations move?
Cations are always smaller than the neutral form of the element.
Are cations positive ions that are nonmetals?
Cations are electrically positive ions
Is a flame test for cations?
yes, for cations
What is a cation test?
Testing for cations is a test used in chemistry to identify metal or metal ions (cations) found in compounds. ... This test uses sodium hydroxide or aqueous ammonia to test and identify metal ions by the precipitation formed.
Do alkali metals generally make anions or cations?
Cations.
Will polonium make cations or anions?
cations
Are cations metals?
cations, they all ionize to a positive charge cation=+ charge anion=- charge
What are metal cations?
Cations are ions with a positive charge. Metal cations are formed when metal loses electrons.
What color flame test does the iodide solution give in flame test?
It is not the anions (e.g. iodide) that are responsible for the flame test color, rather the cations such as sodium ion, potassium ion and calcium ion give you different colors.
Where do cations move?
Cations are always smaller than the neutral form of the element.
Are cations positive ions that are nonmetals?
Cations are electrically positive ions
What kinds of elements forms cations?
Metals generally form cations
In an aqueous solution cations are attracted toward what?
Cations are attracted to anions.
The membrane potential of a cell favors?
movement of cations into the cell
