Practice: Hydrates Directions: Write formulas for each of the following compounds. 1. Nickel (II) sulfite hexahydrate 2. Magnesium sulfite hexahydrate 3. Calcium sulfite dihydrate 4. Sodium bisulfate monohydrate 5. Sodium acetate trihydrate 6. Zinc sulfate monohydrate 7. Copper (II) nitrate trihydrate 8. Manganese (II) sulfate monohydrate 9. Copper (II) sulfate pentahydrate

The formulas for the given hydrates are as follows: 1. NiSO₃·6H₂O 2. MgSO₃·6H₂O 3. CaSO₃·2H₂O 4. NaHSO₄·H₂O 5. NaC₂H₃O₂·3H₂O 6. ZnSO₄·H₂O 7. Cu(NO₃)₂·3H₂O 8. MnSO₄·H₂O 9. CuSO₄·5H₂O Want to know something fascinating? The study of hydrates has a rich history dating back to the early days of chemistry, where scientists like Dmitri Mendeleev made pivotal contributions to our understanding of compounds and their water content. This laid the groundwork for how we classify and study various substances today! Fun fact: Hydrates aren’t just a chemical curiosity—they're practical too! In real-world applications, many hydrates are utilized in construction (like gypsum) and even in the food industry (like certain salts). They play a crucial role in everything from keeping concrete workable to controlling moisture in packaged food!