In a typical laboratory experiment requiring the preparation of spotting solutions, what is the recommended mass of solid material to use for each solution?

• A. About 1.0 g
• B. About 10 g
• C. About 0.1 g
• D. About 0.01 g

Answer: (C)

Verified step by step guidance

1. Understand that spotting solutions are typically prepared in very small quantities because they are used for qualitative analysis or thin-layer chromatography, where only tiny amounts of material are needed.
2. Recognize that using too much solid material can lead to overly concentrated solutions, which may cause inaccurate or unclear results in spotting experiments.
3. Recall that the recommended mass for preparing spotting solutions is generally small, often around 0.1 g, to ensure the solution is dilute enough for effective spotting.
4. Compare the given options and note that 0.1 g is a practical and commonly recommended amount for preparing spotting solutions in a laboratory setting.
5. Conclude that the correct choice is about 0.1 g, as it balances ease of measurement and appropriate concentration for spotting purposes.