Acid-Base Properties and Reactions

The video explores whether calcium nitrite (Ca(NO2)2) is acidic, basic, or neutral when dissolved in water. It begins with the neutralization reaction between nitrous acid and calcium hydroxide, producing calcium nitrate and water. The video then examines the strength of the acid and base, identifying nitrous acid as a weak acid and calcium hydroxide as a strong base. Based on these strengths, it concludes that the resulting solution is basic, with a pH greater than 7.

What is the main question addressed in the video regarding calcium nitrite?

• Whether it is a strong acid

• Whether it reacts with other salts

• Whether it is acidic, basic, or neutral in water

• Whether it is soluble in water

What are the products of the neutralization reaction between nitrous acid and calcium hydroxide?

• Calcium nitrite and water

• Calcium nitrate and water

• Calcium hydroxide and nitrous acid

• Calcium nitrite and hydrogen gas

Which of the following is true about nitrous acid?

• It is a weak acid

• It is a neutral compound

• It is a strong acid

• It is a strong base

How is calcium hydroxide classified in terms of acid-base strength?

• Strong base

• Weak acid

• Weak base

• Strong acid

What is the expected pH of a solution formed by a weak acid and a strong base?

• Exactly 7.5

• Greater than 7

• Equal to 7

• Less than 7

What type of solution does calcium nitrite form in water?

• Amphoteric

• Neutral

• Basic

• Acidic

Why does calcium nitrite form a basic solution in water?

• Because it is a weak base

• Because it is a strong acid

• Because it is a neutral compound

• Because it is formed from a weak acid and a strong base