Questions asked by Luna L.

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• How would you organize the following metal from most active to least active, the most active metal being at the top?
  
• Can someone help me?
  
• Why can't sodium or calcium be precipitated from aqueous solutions?
  
• How do you solve??
  
• What is an indicator? Describe what you would expect to see if one or two drops of phenolphthalein were added to solutions that were...
  
• Chris observes that a drop of an unknown solution on red litmus paper causes no colour change. Chris correctly concludes the solution is either neutral or acidic, but cannot be sure which. Explain. What further test(s) could Chris perform to distinguish?