what is the solution to activity 2.1 class 10 - Acids, Bases and Salt- science -ncert
Answers
Answer:
Explanation:
Process:
1) First of all, assemble the following samples from the science laboratory, after that follow the instructions.
Hydrochloric acid (HCl)
Sulphuric acid (H_{2}SO_{4}
Nitric acid (HN{ O }_{ 3 })
Acetic acid (CH_{3}COOH)
Sodium hydroxide (NaOH)
Calcium hydroxide [Ca(OH)2]
Magnesium hydroxide [Mg(OH)2]
Ammonium hydroxide (N{ H }_{ 4 }OH)
Potassium hydroxide (KOH)
2) Prepare dilute solutions of the respective substances.
2) Get four watch glasses.
3) Put one drop of the first solution in every single one of them and test the arrangement as pursues.
4) Dunk the blue litmus paper in the first watch glass.
5) Dunk the red litmus paper in the second watch glass.
6) Include a drop of methyl orange to the third watch glass.
7) Put in a drop of phenolphthalein to the fourth watch glass.
Observation: Go through the chart attached.
Answer:
table 2.1
Explanation:
Sample Solution Red Litmus Blue Litmus Phenolphthalein Methyl Orange
Conc. HCl No Change Changes to Red No Change No Change
Conc. H2SO4 No Change Changes to Red No Change No Change
Conc. HNO3 No Change Changes to Red No Change No Change
NaOH Changes to Blue No Change Changes to Pink Changes to Yellow
Ca(OH)2 Changes to Blue No Change Changes to Pink Changes to Yellow
KOH Changes to Blue No Change Changes to Pink Changes to Yellow
Mg(OH)2 Changes to Blue No Change Changes to Pink Changes to Yellow
NH4OH Changes to Blue No Change
Changes to Pink Changes to Yellow