2. 7.9 Double-Replacement Reactions Helen Huang, Sheyenne Lising

3. Vocabulary Double Replacement Action A double replacement reaction is a chemical reaction where two reactant ionic compounds exchange ions to form two new products compounds with the same ions. Reactant Starting material in a chemical reaction. Precipitation The action or process of precipitating a substance from a solution.

4. Examples…

5. How To… & Example Click HERE HERE

6. Write a balanced chemical equation for this double replacement reaction BaCl2(aq) + K2CO3(aq) a. BaCO 3(s) + 2KCl (aq) b. BaCO 2(s) + 3KCl (aq) c. BaCO (s) + 3KCl (aq) d. 3BaCO (s) + KCl (aq)

7. Fun Facts Soap (KOH) was synthesized by Egyptians, Romans, and Chinese. Each ancient civilization used unique procedures to synthesize KOH. The ancient Chinese made soap using a double-replacement reaction. The reaction must be driven by one of three driving forces: Formation of a solid, formation of a gas or formation of a weakly ionizing compound such as water. Click Here

8. Write a balanced chemical equation for this double replacement reaction AgNO 3 + NaCl a. AgCl 3 + NaNo b. ClNO 3 + AgNa c. AgNa + ClNO 3 d. AgCl + NaNO 3

9. Write a unbalanced chemical equation for this double replacement reaction FeS (s) + HCl (aq) a. FeH + SCl b. ClFe + HS c. H 2 S (g) + FeCl 2(aq) d. Fe+ H

10. Homework