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प्रश्न
Consider the following salt:
YCl
What would be the pH of the solution if, in YCl, Y is sodium? Give a reason for your answer.
उत्तर
pH is a measure of how acidic or basic a solution is. The range goes from 0 to 14, with 7 indicating neutral. pH of less than 7 indicates that the solution is acidic, whereas a pH of greater than 7 indicates a basic solution. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the solution. The solution that has more free hydrogen ions will be acidic, whereas the solution with free hydroxyl ions will be basic in nature.
Sodium chloride, commonly known as salt, is an ionic compound with the chemical formula NaCl, representing a ratio of sodium and chloride ions. It is a salt which is composed of a strong acid, i.e. hydrogen chloride (HCl), and a strong base, i.e. sodium hydroxide (NaOH). So, when it is dissolved in water it will have an equal ratio of hydrogen and hydroxyl ions. Thus, making the solution neutral, that is it will have a pH scaling 7.
\[\ce{NaOH + HCl -> NaCl + H2O}\]
Hence, the pH of the aqueous NaCl solution will be 7.
संबंधित प्रश्न
When phenolphthalein is added to NaOH, the colour of the solution will become _________.
- colourless
- red
- pink
- yellow
Name the gas evolved when zinc granules are treated/heated with:
hydrochloric acid solution
With which substance should chlorine be treated to get bleaching powder?
Name a metal compound which has detergent properties (cleansing properties).
Read the following statements:
I. When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.
II. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic.
III. When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
IV. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
Which of the above statements are correct:
(A) I, and II
(B) II and III
(C) III and IV
(D) I and IV
Choose the correct alternative and rewrite the following sentence.
Phenolphthalein is ___________ type of indicator.
Name the acid present in ant sting and give its chemical formula. Also give the common method to get relief from the discomfort caused by the ant sting.
Consider the following salt:
\[\ce{ZCO3}\]
What would be the change in colour in blue litmus if \[\ce{ZCO3}\] is added to it and Z is potassium?
Some metals react with acids to produce salt and hydrogen gas. Illustrate it with an example. How will you test the presence of this gas?
Give a balanced equation for the reaction:
Silver nitrate solution and sodium chloride solution.
