Explain how we can detect the ph level of an acid and a base and give examples of four indicators. what is the ph of metal oxides / hydroxides and non metal oxides / hydroxides??? and what are the exception??
Answers
We can use many indicators. such as,
- Red litmus paper
- Blue litmus paper
- Phenolphthalein
- Methyl Orange
- When we dip red litmus paper in given solution if it paper turns blue then it is a basic (alkaline) solution.
- When we dip Blue litmus paper in given solution if it paper turns red then it is a acidic solution.
- When we put Phenolphthalein in given solution if it turns colourless then it is Acidic solution.
- When we put Phenolphthalein in given solution. If the solution turns pink in colour then the solution is Basic.
The pH of Metal Oxides / hydroxide are more than 7
i.e they are basic
The pH of Non-metal Oxides/ hydroxide are less than 7 . i.e they are acidic.
PLEASE MARK AS BRAINLIEST.....
Explanation:
Answer:
Hey mates
Here is your answer
What are metal hydroxides ?
Metal hydroxides are compounds which consist of a metal and OH- ions or an hydroxyl ion combined.
Example : NaOHNaOH
What are metal oxides ?
Metal oxides are compounds which consist of metal and oxygen combined together .
Example: Na_{2}ONa
2
O
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Why they are bases ?
Base is a compound which react with hydrogen ions of an acid to form water and salt.
HClHCl is an acid .
Na_{2}O\:+2HCl\:\implies\:2NaCl\:+\:H_{2}ONa
2
O+2HCl⟹2NaCl+H
2
O
As an acid HCl reacts with \bf{Na_{2}O}Na
2
O to give a salt NaCl and water , it has to be a base .
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NaOH\:+HCl\:\implies\:NaCl\:+\:H_{2}ONaOH+HCl⟹NaCl+H
2
O
As an acid HCl reacts with NaOH to give a salt NaCl and water , it has to be a base .
This proves that all metal oxides and hydroxides are bases.
You can repeat the experiment with other metals other than Na.
Hope it helps you:-)
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