mention chemical properties of acid and base with examples
Answers
Explanation:
Acids change the colour of litmus from blue to red.
They convert the colour of Methyl Orange from Orange/Yellow to Pink.
Acids turn the pink colour of Phenolphthalein to colourless.
Acids can conduct electricity.
Some Acids are highly corrosive in nature which means that they corrode or rust metals.
Acids tend to evolve hydrogen gas whilst reacting with an active metal such as Zn, Mg, etc.
They produce H+ ions when mixed with water.
Acids lose their acidity when mixed with a base.
When equal amounts of acid and base are combined the process of neutralization occurs and salt and water is formed,
The pH value of acid is from 0-6. Learn the concept of pH value here.
Acids are sour in taste.
Acids react with carbonates and hydrogen carbonates to form a salt, water, and carbon dioxide gas.
Extremely active metals such as Potassium (K), Calcium (Ca), Sodium (Na), etc tend to explode when combined with acids.
Weak Acids like Carbonic Acid doesn’t act with any metal at all.
Nitric Acids doesn’t usually exhibit acidic properties, it exhibits oxidizing properties instead.
Metals that generally react with dilute acid to form salt and hydrogen are the metals which lie above hydrogen in the metal activity series.
Acids form a salt, water and sulphur dioxide while reacting with sulphites and bisulphites.
Acids and metal sulphides form salt and hydrogen sulphide.
They are classified on the basis of their sources, strength, concentration, the presence of oxygen and its basicity.
The different types of acids are organic acids, mineral acids, strong acids, weak acids, concentrated acids, dilute acids, Oxy-acids, Hydracids, monobasic acids, dibasic acids, and tribasic acids.
Bases change the colour of litmus from red to blue.
They are bitter in taste.
Bases lose their basicity when mixed with acids.
Bases react with acids to form salt and water. This process is called Neutralisation Reaction(Read).
They can conduct electricity.
Bases feel slippery or soapy.
Some bases are great conductors of electricity.
Bases like sodium hydroxide, potassium hydroxide, etc are used as electrolytes.
Alkalis are bases that produce hydroxyl ions (OH-) when mixed with water.
Strong alkalis are highly corrosive in nature whereas other alkalis are mildly corrosive.
The pH value of bases ranges from 8-14.
Alkalis and ammonium salts produce ammonia.
Hydrogen gas is evolved when metals react with a base.
Bases are classified on the basis of strength, concentration and acidity.
The different kinds of acids are strong base acid, weak base acid, concentrated base, dilute base, monoacidic base, diacidic base and triacidic base.
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Answer :
Physical properties of Acid and Base :
1) Acids are sour in taste, turn blue litmus red, and dissolve in water to release H+ ions
e.g. HCl, H2SO4, HNO3 etc.
2) Bases are bitter in taste, have soapy touch, turn red litmus blue and give hydroxide ions in solution.
e.g. NaOH, KOH etc.
Physical properties of salt are:
Salt is a white cubic crystals.When the salt is pure it clear.
It is odorless but has strong salty taste.
Solubility in water is different at different temperatures.
Chemical properties of acids:
i) Acids react with active metals to give hydrogen gas.
Eg : Zn + H2SO4→ZnSO4 + H2
ii) Acids react with metal carbonate and metal hydrogen carbonate to give carbon dioxide.
Eg : NaHCO3 +HCl→NaCl + H2O + CO2
reaction.
iii) Acids react with bases to give salt and water. This reaction is called as neutralization
Eg : NaOH + HCl→ NaCl +H2O
iv) Acids react with metals oxides to give salt and water.
Eg : CuO + H2SO4→CuSO4 + H2O
Chemical properties of Bases:
i) Reaction with Metals - Certain reactive metals such as Zinc, Aluminium, and Tin react with alkali solutions on heating and hydrogen gas is evolved.
Eg : 2NaOH + Zn→Na2ZnO2 +H2
ii) Reaction with acids -Bases react with acids to form salt and water.
Eg : KOH +HCl→KCl +H2O
iii) Reaction with Non -metallic oxides – These oxides are generally acidic in nature. They react with bases to form salt and water.
Eg : 2NaOH + CO2→Na2CO3 + H2O
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