Physical and Chemical Change Experiments
Lemon and Salt or Baking Soda - Make a paste of lemon juice and salt and rub with a soft cloth, rinse with water, and dry. Or use a slice of lemon sprinkled with baking soda. Rub brass with the lemon slice, rinse with water, and dry. Vinegar and Salt - Pour vinegar over the surface. Sprinkle salt over the acid and rub in the mixture. ................
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