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Why is sodium ions reduced to na while calcium does not in the electrolysis of fused nacl infact both ions are present in it. cacl2 to lower the melting point of na?
AK11
its because the reduction potential of calcium is less than sodium
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∙ 12y ago
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How is oxygen removed from metal ores?
Depending on the reactivity of metal combined in the ore . It can be done by thermal reduction , or by electrolysis. NB Iron ore is reduced by thermally, in the blast furnace. Bauxite ( Aluminium oxide) is reduced by electrolysis, in an electrolysis plant.
Which metal ion is reduced by lead?
Calcium, mercury, cadmium, or potassium?
What is the melting temperature of metal?
Melting temperature is the point where a substance is reduced to a liquid (this is the state it changes to). the usual melting point of substances is 100 degrees or higher.
How is the melting of an ice cube similar to the grinding of chalk into a powder?
I'm not so sure there is a similarity. When ice melts it undergoes a phase change. The solid H2O becomes liquid H2O and energy is absorbed in the form of heat. Ice can also become a liquid at 0° C, its melting point, or colder when the pressure is significantly reduced. When chalk, typically calcium carbonate (CaCO3), is ground into powder it does not undergo any phase change. It is still solid calcium carbonate. The grinding action will release energy in the form of heat by the cause of friction. So, ice melting is a phase change that is endothermic, meaning it absorbs heat. The grinding chalk is not a phase change and is exothermic, meaning it releases heat.
What is the reaction between calcium and water?
Calcium reacts with water to form calcium hydroxide and hydrogen gas. Calcium is oxidised and hydrogen is reduced, so it is a redox reaction. It is also a displacement reaction as hydrogen in water is displaced by calcium.
Which component is reduced during the electrolysis of brine?
water
How is oxygen removed from metal ores?
Depending on the reactivity of metal combined in the ore . It can be done by thermal reduction , or by electrolysis. NB Iron ore is reduced by thermally, in the blast furnace. Bauxite ( Aluminium oxide) is reduced by electrolysis, in an electrolysis plant.
How can sodium be reduced from sodium chloride?
Sodium can be obtained from sodium chloride by the electrolysis of molten NaCl.
How can silica contains be reduced from calcium fluoride?
by taking it out
Sodium chloride melting point reduced by adding calcium chloride?
Yes, a mixture containing 42% NaCl and 58% CaCl2 melts at about 590 Celsius while pure sodium chloride melts at about 800 Celsius.
Is it possible to remove hardness of water by electrolysis?
Yes. The dissolved cations are reduced and form a solid plating on the electrode.
How can human body calcium levels be reduced?
Eat a diet deficient in calcium, phosphorus or vitamin D.
Which metal ion is reduced by lead?
Calcium, mercury, cadmium, or potassium?
What compound reduced by hydrogen1 cobalt oxide 2 mangnese dioxide 3 magnesium oxide 4 calcium oxide?
Cobalt oxide can be reduced by hydrogen to form cobalt metal. Manganese dioxide can be reduced by hydrogen to form manganese metal. Magnesium oxide cannot be reduced by hydrogen. Calcium oxide cannot be reduced by hydrogen.
What risk will be reduced when you get enough calcium?
deficiencies related to bone and teeth health.
In animals Birth defects reduced birth rates and stillbirths are a deficiency of?
Calcium
What is the equation for cathodic reaction?
During electrolysis a cation moves towards cathode where it accepts the electrons and becomes reduced. M+ + e- ------> M
