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In station 1 we dissolved Mg ribbons in 3M and 1M solutions of HCL. The ribbon dissolved in the 3M HCL in 5 seconds, while the ribbon in the 1M HCL dissolved in 1 minute 43 seconds. This proved that higher concentrations speed up reactions.
In station 2 we put 1/4 of an aska-seltzer tab in hot water and another one in old water. The tab in hot water dissolved much faster than the tab in the cold water. This proved that the higher the temperature, the faster the reaction will be.
In station 3 we put different metals in 3M HCL; Mg, Zn, and Cu. The Mg dissolved in 31 seconds, the Zn took over 3 minutes and the Cu had no visible reaction...
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