Solubility of Lithium Phosphate

The video explores the solubility of lithium phosphate (Li3PO4) in water. Initially, it is expected to be soluble due to group 1 elements' solubility rules. However, phosphates are generally insoluble except for group 1 and ammonium phosphates. A solubility table shows lithium phosphate as insoluble, conflicting with the rules. The solubility is low at 0.039 grams per 100 milliliters, compared to lithium chloride's 83.5 grams. Some sources label lithium phosphate as slightly soluble, while others say insoluble. In educational contexts, the solubility table should be prioritized. The video concludes that lithium phosphate is slightly soluble.

Which group of elements is generally soluble in water according to the solubility rules?

• Transition metals

• Group 2 elements

• Group 1 elements

• Noble gases

What is the general solubility rule for phosphates in water?

• All phosphates are soluble

• Most phosphates are insoluble

• Phosphates are soluble only in hot water

• Phosphates are always insoluble

Which phosphates are exceptions to the general insolubility rule?

• Group 2 phosphates

• Noble gas phosphates

• Ammonium and group 1 phosphates

• Transition metal phosphates

What does the solubility table indicate about lithium phosphate?

• It is slightly soluble

• It is insoluble

• It is highly soluble

• It is soluble only in acidic solutions

How much lithium phosphate dissolves in 100 milliliters of water?

• 10 grams

• 83.5 grams

• 0.039 grams

• 1.0 grams

Which compound is more soluble in water, lithium phosphate or lithium chloride?

• Lithium phosphate

• Neither is soluble

• Lithium chloride

• Both are equally soluble

What might some sources say about the solubility of lithium phosphate?

• It is soluble only in hot water

• It is slightly soluble

• It is highly soluble

• It is completely insoluble

In a school context, if given a solubility table, how should lithium phosphate be classified?

• As soluble

• As highly soluble

• As slightly soluble

• As insoluble

What is the overall conclusion about the solubility of lithium phosphate in water?

• It is slightly soluble

• It is highly soluble

• It is soluble only in acidic solutions

• It is insoluble