0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Why is croylite added to aluminium?
To help remove impurities.
Would the molecular organization of pure gold be amorphous if no impurities were present.?
Gold has a crystalline structure.
How is the melting point of asolid and boiling point of a liquidaffected when impurities are added to the substances?
Adding impurities lowers the melting point and raises the boiling point.
If th me sample in question contains at least some gold what is its likely composition?
A mixture of gold and denser impurities
Why gold is melting in graphite crucible?
It is not obligatory to melt gold in a graphite crucible; generally is important to avoid contamination of gold with impurities from the crucible.
Which impurities are added to pure gold for making jewelry?
Gold, copper, silver, zinc, Platinum, palladium, Nickel, Iron, Cadmium and aluminium.
What is the difference between gold and pure gold?
gold can have impurities
How do you separate gold from impurities?
you use an ore to separate gold from impuritties
What could happen if gold is placed in dilute hydrochloric acid?
Nothing, gold does not react with hydrochloric acid, if there are impurities of other metals in gold then impurities may react and form chloride salts.
Why is croylite added to aluminium?
To help remove impurities.
Why is limestone added to the blast furnace during the extraction of iron?
Iron ore contains the impurities sand and clay, which are silicon oxides. Limestone is added to remove these impurities.
What may happen to the boiling point of a substance if there are impurities present. Explain in terms of the nature of impurities.?
it might decrease or increase depends on the impurities added.:D
Would the molecular organization of pure gold be amorphous if no impurities were present.?
Gold has a crystalline structure.
How do you you convert 100 percent gold to 91.6 percent gold?
The answer is in the question. Take 91.6 units of gold and add 8.4 units of impurities. This is equivalent to taking 100 units of gold and adding 100 x 8.4/91.6 = 9.17 units of impurities.
What do you do after you get the gold nugget?
you melt it down remove the impurities and shape it into what you want.
How do you get pure 24 karat gold out from 10 karat gold?
Removing all of the impurities in the 10 karat gold will leave you with 24 karat gold.
What is extrinsic conductor?
Impure semi conductor material are called extrinsic semi conductor as there a small quantity of foreign particle is present. Two types of impurities are added to an extrinsic semi conductor. When impurities belonging to third group are called as trivalent or acceptor impurities such as boron, aluminum, indium or gallium when these impurities are added in pure semi conductors they form p-type semi conductor. And similarly when impurities belonging to group fifth called as penta valent or donor impurities such as arsenic, antimony, bismuth or phosphorus are added to a semi conductor they form N-type semi conductor .
