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Limewater Investigation

Lab. Limewater Investigation. I will notice that when a chemical reaction occurs, the atoms of substances (reactants) rearrange to form new substances (products). First things first…. Reactant: a starting substance in a chemical reaction Product: a substance produced in a chemical reaction

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Limewater Investigation

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  1. Lab Limewater Investigation I will notice that when a chemical reaction occurs, the atoms of substances (reactants) rearrange to form new substances (products).

  2. First things first… • Reactant: a starting substance in a chemical reaction • Product: a substance produced in a chemical reaction • Example: HCl + NaOH H2O + NaCl Reactants yields Products

  3. Procedures • Put on protective eyewear. • Put both pieces of rubber tubing on the same piece of rigid plastic tubing. Like shown in the diagram at the end of the directions. • Using the syringe, measure 30mL of limewater. Pour limewater into the plastic bottle. • Seal the bottle with the rubber stopper, making sure that the smaller of the 2 flexible tubes is inside the bottle. • Take turns using your straw mouthpieces to gently bubble one breath of air into the bottle through the longer of the plastic tubes. • Repeat step 5 until everyone in your group has had two turns.

  4. Diagram

  5. Clean Up • Rinse syringe with water • Throw away straw pieces. • Detach rubber stopper from bottle and empty the bottle contents into the sink. • Use the vinegar/acid wash in your bin to swish away any left over residue in the bottle. • Return the vinegar/acid wash to the vinegar bottle in your bin. • Rinse the plastic bottle once more with fresh water from the sink. • Put cleaned (&dry-ish) supplies back in your bin.

  6. Results & Conclusions • Describe what changes you observed in the bottle. • Starting substances change into new substances during chemical reactions. Do you think a reaction occurred I the bottle? Why or why not?

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