Solubility and Properties of Barium Phosphate

The video explains the reaction of barium phosphate (Ba3(PO4)2) with water (H2O). It discusses the solubility rules, noting that barium phosphate is largely insoluble in water, meaning it remains a solid. However, a tiny amount does dissolve, and the video provides the equation for this small dissolution. The video concludes by reiterating the insolubility of barium phosphate.

What is the chemical formula for barium phosphate?

• Ba3(PO4)2

• Ba(PO4)2

• BaPO4

• Ba2(PO4)3

What is the purpose of checking solubility rules in the context of barium phosphate?

• To check if it evaporates in water

• To find out if it dissolves in water

• To determine if it reacts with water

• To see if it changes color in water

According to solubility rules, what is the general solubility of phosphates?

• All phosphates are soluble

• All phosphates are insoluble

• Most phosphates are insoluble

• Most phosphates are soluble

What happens to barium phosphate when it is placed in water?

• It reacts vigorously

• It dissolves completely

• It remains mostly solid

• It evaporates

What does 'insoluble' mean in the context of barium phosphate?

• Almost all of it does not dissolve

• It dissolves partially

• It does not dissolve at all

• It dissolves completely

What ions are formed from the small amount of barium phosphate that dissolves?

• Ba2+ and PO4^3-

• Ba+ and PO4^2-

• Ba2+ and PO4^2-

• Ba3+ and PO4^-

What does 'aq' signify in a chemical equation?

• Solid state

• Liquid state

• Gaseous state

• Aqueous or dissolved in water

Why is water sometimes not written in the products of a dissolution equation?

• Because it reacts completely

• Because it evaporates

• Because 'aq' already indicates dissolution in water

• Because it is not involved in the reaction

What is the overall behavior of barium phosphate in water?

• It remains mostly solid

• It forms a new compound

• It dissolves completely

• It reacts with water

Who is the presenter of the video?

• Dr. C

• Dr. B

• Dr. D

• Dr. A