human
In order for the reaction 2Al + 6HCl --> 2AlCl3 + 3H2 to occur, which of the following must be true?
gpt
Al must be above H on the activity series.
Explanation: The activity series is a list of metals in order of their reactivity, with the most reactive at the top and the least reactive at the bottom. For a single displacement reaction to occur, the reactant metal must be above the other metal on the activity series.