Single+Replacement+I

Station 1

Single replacement occurs when two different compounds switch places to combine with the same anion. A + BC → B + AC Mg(s) + 2HCl →MgCl 2(aq) + H2(g) M (s) + MX (aq) ? M (s)+ MX (aq)

Station 2  Single replacement demonstration 1 Example 1
 * In galvanized steel, when the steel starts to corrode after the coating has been scratched, the zinc in the coating will undergo a single replacement reaction with the steel, forming zinc ions and iron atoms. Rust would be converted back to iron, in other words. When the zinc ions switched with the iron atoms during single replacement rust to iron will occur. **

[] []  **Example 2 ** ** Single replacement example **
 * Another example occurred in the Statue of Liberty. The outer layers of the statue are made of copper, but the inner support was made of steel. When the copper started to react with air, forming a verdigris coating, a single replacement reaction caused the iron to convert the copper back to copper metal; the iron started to rust, and the entire inner support had to be replaced in the 1980s. **
 * A + BX → AX + B **



Station 4 media type="custom" key="3675291"

Station 5
If you add magnesium metal (Mg) to hyrdochloric acid (HCl), the Mg will dissolve and will form bubbles of hydrogen gas (H2). When the Mg dissolves, it forms magnesium ions with a +2 charge (Mg2+), and when the hydrogen atoms form H2 gas, they leave behind chloride ions, Cl-. Mg + 2 HCl --> Mg2 + 2Cl + H2

Single replacement reaction of hydrogen in a metal (Mg). The oxygen came from the stick the was caught on fire.