Chemical Properties of Sodium Compounds

The video explores whether sodium phosphate (Na3PO4) is acidic, basic, or neutral when dissolved in water. It explains that sodium phosphate is formed from the reaction of sodium hydroxide, a strong base, and phosphoric acid, a weak acid. By analyzing the strengths of these compounds, it concludes that Na3PO4 is basic or alkaline in water, with a pH greater than 7.

What is the main question addressed in the video regarding sodium phosphate?

• Whether it is soluble in water

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

• Whether it reacts with metals

• Whether it is a strong acid

Which two compounds react to form sodium phosphate?

• Sodium sulfate and nitric acid

• Sodium bicarbonate and hydrochloric acid

• Sodium hydroxide and phosphoric acid

• Sodium chloride and sulfuric acid

What is the strength of sodium hydroxide?

• Strong acid

• Strong base

• Weak base

• Weak acid

What is the strength of phosphoric acid?

• Strong acid

• Strong base

• Neutral

• Weak acid

What is the role of the table mentioned in the video?

• To memorize the strength of acids and bases

• To calculate the pH of solutions

• To provide a list of chemical elements

• To list all possible reactions

What is the pH level of a solution when sodium phosphate is dissolved in water?

• Less than 7

• Equal to 7

• Greater than 7

• Exactly 7.5

How would you describe a solution of sodium phosphate in water?

• Amphoteric

• Basic

• Neutral

• Acidic