give reason-
a. Dry HCl does not change the colour of the dry blue litmus paper.
b. Concentration of H3O
+
ions is affected when a solution of an acid is diluted.
c. Why distilled water does not conduct electricity.
d. Electrolysis of a concentrated solution of Sodium Chloride known as Chlor- Alkali process.
e. Tooth decay starts when the pH of mouth is lower than 5.5.
Answers
Answer:
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Explanation:
Answer:
A. Dry HCL it does not dissociate to give H+ ions. Acids dissociate to give ions only in the aqueous solution. In this, HCL is not in the aqueous form nor the litmus paper is wet, so the colour of the litmus paper does not change.
B. When the solution of an acid is diluted then its strength decreases as there is decrease in the concentration of hydronium (H3O+)ions. ... It means number of (H3O+) remains same but the total volume of the solution has increased thus causing the fall in concentration of hydronium ions as concentration is quantity/volume.
C. Distilled water is a pure type of water which does not contain any ions in it. ... These gases dissolve in water to form some kind of acids like carbonic acids which dissociates to give ions. Thus rainwater is conducting electricity while distilled water is not conducting electricity.
D. The process of electrolysis of sodium chloride solution is called the chlor-alkali process because 'chlor' (chlorine) and alkali (sodium hydroxide, NaOH) are formed as products.
E. Bacteria in the mouth create acids after eating through the oxidation of sugar and food particles in the mouth. Tooth decay starts when the mouth's pH is below 5.5. ... Since plaque coats the teeth, saliva can not reach the tooth layer to neutralize the acid.