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Question
Complete the following table:
|
Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
|
|
|
|
|
Quick lime |
|
|
|
|
|
Oil of vitriol |
|
|
|
|
|
Washing soda |
|
|
|
|
|
Solid caustic soda |
|
|
|
|
|
Blue vitriol |
|
|
|
|
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Solution
|
Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
Potassium hydroxide |
KOH |
Base |
Deliquescent substance |
|
Quick lime |
Calcium oxide |
CaO |
Base |
Hygroscopic substance |
|
Oil of vitriol |
Sulphuric acid |
H2SO4 |
Acid |
Hygroscopic substance |
|
Washing soda |
Hydrated sodium carbonate |
Na2CO3.10H2O |
Salt |
Efflorescent substance |
|
Solid caustic soda |
Sodium hydroxide |
NaOH |
Base |
Deliquescent substance |
|
Blue vitriol |
Copper sulphate |
CuSO4 |
Salt |
Efflorescent substance |
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RELATED QUESTIONS
Define water of crystallization. Give two examples with formulae.
What do you observe when Blue vitriol is heated?
Give one word for the following statement:
A property due to which a substance absorbs water without dissolving.
State the methods by which hydrated salts can be made anhydrous.
Differentiate between ‘hydrated’ & ‘anhydrous’ crystals. Give the chemical formula of – the following hydrated crystals -
(a) Washing soda
(b) Gypsum
(c) Blue vitriol
(d) Epsom salt
(e) Glauber’s salt.
State which crystal from (a) to (e) is a pentahydrate.
Differentiate between an efflorescent, deliquescent & ‘ hygroscopic substance with suitable examples.
Explain the following observation:
In the expression anhydrous copper sulphate, what is meant by “anhydrous”?
Differentiate between hydrated and anhydrous crystals with examples. State three defined changes that occur when hydrated copper sulphate is heated.
Match the following
| 1. | Blue vitriol | CaSO4.2H2O |
| 2. | Gypsum | CaO |
| 3. | Deliquescence | CuSO4.5H2O |
| 4. | Hygroscopic | NaOH |
'A' is a blue coloured crystalline salt. On heating, it loses blue colour and to give 'B'. When water is added, 'B' gives back to 'A'. Identify A and B, write the equation.
