write chemical reactions
when a metal calcium carbonate reacts with an acid it forms corresponding salt and carbon dioxide gas
Answers
Answer:
CO32− + H2O ⇌ HCO3− + OH− Carbonates react with acids, forming salts of the metal, gaseous carbon dioxide, and water. ... CaCO3 + 2HCl → CaCl2 + CO2 + H2O The hydrogen carbonate anion is also a base.
Answer:
Acids are sour in taste.
2. All acids give H+ hydrogen ion with water.
3. It turns colour of blue litmus to red.
4. Acids conduct electricity current.
5. It reacts with metals produces salt and hydrogen gas.
Zinc + hydrogen chloride zinc chloride + hydrogen gas.
Examples: Sulphuric acid (H2SO4), Acetic Acid (CH3COOH), Nitric Acid (HNO3) etc.
Properties of Acids
Properties Of Bases
Bases are bitter in taste.
All bases give (OH–
) hydroxide ion with water.
It turns colour of red litmus into blue.
Bases conduct electricity current.
It also reacts with metals gives salt and hydrogen gas.
Examples: Sodium hydroxide (caustic soda) – NaOH
Calcium hydroxide – Ca(OH)2
Potassium hydroxide (caustic potash) – (KOH)
Indicators: Those substances which indicate the acidic or basic nature of the solution of
substance by the change in colour.
Types of Indicator: There are many types of indicators. Some common types of indicators are:
1. Natural Indicators:
Indicators obtained from natural sources are called Natural Indicators.
Litmus, turmeric, red cabbage, China rose, etc., are some common natural indicators
used widely to show the acidic or basic character of substances.
Litmus: Litmus is obtained from lichens. The solution of litmus is purple in colour. Litmus
paper comes in two colours- blue and red.
An acid turns blue litmus paper red.
A base turns red litmus paper blue.
Turmeric: Turmeric is another natural indicator. Turmeric is yellow in colour. Turmeric solution
or paper turns reddish brown with base. Turmeric does not change colour with acid.
Explanation:
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