When reviewing your , watch for these frequent mistakes:
: Provides a specific pH value by changing to different colors (e.g., red for strong acids, purple for strong alkalis). Section 9.3: Reactions of Acids Reaction with Metals : Acid + Metal right arrow Salt + Hydrogen gas. Test for Hydrogen : Use a burning splint; it burns with a "pop" sound Reaction with Carbonates : Acid + Carbonate right arrow Salt + Carbon dioxide + Water. Test for Carbon Dioxide : Turns limewater milky. Neutralization : Acid + Alkali right arrow Salt + Water. Course Hero Section 9.4: Potential Hazards and Safety Corrosive Substances : Concentrated acids and alkalis can cause severe burns. Safety Precautions safety spectacles and protective gloves.
This reaction produces carbon dioxide , water, and a salt. This is why acid rain can damage marble statues or buildings made of limestone. Section 9.5: Safety and First Aid new mastering science workbook 2b answer chapter 9
: Common laboratory acids include hydrochloric acid , sulphuric acid , and nitric acid . Household examples include vinegar (ethanoic acid) and lemon juice (citric acid).
: Identifying substances by taste (sour for acids, bitter for alkalis) is dangerous, so the chapter emphasizes using natural indicators like red cabbage or rose petals. When reviewing your , watch for these frequent
Alkalis often have a bitter taste and a slippery feel .
Dilute acids are not dangerous. (False – they can still be irritants). Test for Carbon Dioxide : Turns limewater milky
Mastering Unit 9: Common Acids and Alkalis Mastering the concepts in Chapter 9 of the New Mastering Science Workbook 2B