Strontium Hydroxide Properties and Reactions

The video explains the chemical behavior of strontium hydroxide (Sr(OH)2) when it interacts with water. It describes how strontium hydroxide, an ionic compound, dissociates into strontium ions and hydroxide ions, making it a strong base. Despite its low solubility in water, the portion that does dissolve dissociates completely. The video compares the solubility of strontium hydroxide with sodium hydroxide, highlighting the differences in their solubility while both are considered strong bases. The video also discusses the chemical equation for the dissolution process and the placement of water in the equation.

What type of substance is strontium hydroxide when it reacts with water?

• Non-metallic compound

• Molecular compound

• Ionic substance

• Covalent compound

What ions are formed when strontium hydroxide dissociates in water?

• Strontium ions and oxygen ions

• Strontium ions and hydroxide ions

• Strontium ions and hydrogen ions

• Hydroxide ions and oxygen ions

What is the charge of the hydroxide ion formed from strontium hydroxide?

• 2+

• 1+

• 1-

• 0

Why is strontium hydroxide considered a strong base?

• It does not dissolve in water

• It forms a weak acid in water

• It dissociates completely in water

• It is highly soluble in water

How does the solubility of strontium hydroxide compare to sodium hydroxide?

• Strontium hydroxide is more soluble

• Both have the same solubility

• Sodium hydroxide is more soluble

• Neither is soluble in water

What happens to the dissolved strontium hydroxide in water?

• It forms a precipitate

• It evaporates

• It remains as a solid

• It dissociates into ions

What is the solubility of strontium hydroxide at zero degrees Celsius?

• 10 grams per 100 milliliters

• 1 gram per 100 milliliters

• 418 grams per 100 milliliters

• 0.041 grams per 100 milliliters

What makes strontium hydroxide a strong base despite its low solubility?

• It is highly reactive

• It is a covalent compound

• It dissociates completely in water

• It forms a strong acid

Why do we not need to write H2O again on the product side of the equation?

• Because it is not involved in the reaction

• Because it is already implied by the aqueous state

• Because it evaporates

• Because it forms a solid

What is the preferred notation for water in the equation of strontium hydroxide?

• On the reactant side

• On the product side

• Above the arrow

• Below the arrow