Handwritten solutions to a chemistry worksheet on calculating the percentage of water in hydrates, showing step-by-step calculations for CuSO₄·5H₂O, Na₂S·9H₂O, and BaCl₂ hydrate.
A handwritten worksheet titled "Composition of Hydrates Worksheet (Red Book)" with three problems involving calculating the percentage of water in hydrates, including CuSO₄·5H₂O, Na₂S·9H₂O, and a BaCl₂ hydrate, with red ink calculations and green boxes highlighting final answers.