Advertisements
Advertisements
प्रश्न
Answer the following question.
Identify the acid and base which form sodium hydrogen carbonate. Write the chemical equation in support of your answer. State whether this compound is acidic, basic, or neutral. Also, write its pH value.
उत्तर
Sodium hydroxide(base) and hydrogen carbonate(acid) combine to form sodium hydrogen carbonate.
\[\ce{2NaOH + H2CO3 -> Na2CO3 + 2H2O}\]
Sodium hydrogen carbonate is a basic salt because NaOH is a strong base and H2CO3 is a weak acid.
pH value of sodium hydrogen carbonate is 8.27.
APPEARS IN
संबंधित प्रश्न
With the help of labelled diagrams, describe an activity to show that acids produce ions only in aqueous solutions.
A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains:
(a) Mg(OH)2
(b) Na2CO3
(c) NaCl
(d) HCl
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
On the basis of the above reaction, what can you say about the nature of copper oxide?
What ions are present in the solutions of following substances? (write the symbols only)
Nitric acid
What ions are present in the solutions of following substances? (write the symbols only)
Magnesium hydroxide
Choose the correct alternative and rewrite the following sentence.
Phenolphthalein is ___________ type of indicator.
During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to ______
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
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?
Give a balanced equation for the reaction:
Silver nitrate solution and sodium chloride solution.