What Are Solubility Rules for Compounds in Water?

TL;DR

Solubility rules state that certain compounds are always soluble in water, such as lithium, sodium, and potassium ions. In contrast, some ions like silver and lead can make compounds insoluble. Hydroxides are generally insoluble, with exceptions including alkali metals and some group 2 metals. Understanding these patterns helps determine a compound's solubility.

Transcript

in this video we're going to talk about soluble and insoluble compounds we're going to talk about how to tell if it's going to be aqueous or solid so we're going to go over the solubility rules and then towards the end of this video we're going to go and do a few practice problems and some examples so let's get started so let's start with the solub... Read More

Key Insights

• 😑 Metal ions in the first column of the periodic table (group 1) are always soluble.
• 😑 Ions such as silver, lead, and mercury can cause compounds to be insoluble in some cases.
• 🤘 Hydroxides are generally insoluble, except for alkali metals and some group 2 metals.
• ❓ Nitrates, acetates, and chlorates are always soluble.
• 💦 Understanding solubility rules can help in determining whether a compound is soluble or insoluble in water.
• 📏 Practicing examples and problems is crucial for understanding solubility rules and compounds.
• 😑 Remembering the ions that are always soluble can help solve a significant proportion of solubility problems.

Questions & Answers

Q: What are some ions that are always soluble in water?

Ions such as lithium, sodium, and potassium are always soluble in water. These metals are in the first column of the periodic table.

Q: Which compounds are generally insoluble with hydroxides?

Hydroxides are generally insoluble, but exceptions include alkali metals like sodium and potassium. Group 2 metals like calcium and strontium are also soluble with hydroxide.

Q: Are chlorides, bromides, and iodides generally soluble?

Chlorides, bromides, and iodides are generally soluble, except when bonded to elements such as silver, lead, and mercury.

Q: What are some generally insoluble ions?

Hydroxides, carbonates, phosphates, chromates, and sulfides are generally insoluble. The exceptions are group 1 metals like sodium, lithium, and potassium, as well as the ammonium ion.

Summary & Key Takeaways

• The video provides an overview of solubility rules for determining whether compounds are soluble or insoluble in water.

• Compounds such as lithium, sodium, and potassium ions are always soluble, while others like silver and lead can be insoluble in some cases.

• Hydroxides are generally insoluble, but exceptions include alkali metals like sodium and potassium.