What type of chemical reation is :

Na + H2O---) NaOH + H2? The 2s are subscripts but I couldn't get it to type that way.

We CAN do subscripts on this board but it's usually too much trouble and all of us understand that the 2s are subscripts. We use the caret(^) to show a superscript like this. 2^3 is 2 cubed = 8.

The reaction is a single replacement reaction. You are replacing H with Na.

The chemical reaction "Na + H2O → NaOH + H2" is an example of a type of chemical reaction known as a single displacement or substitution reaction.

To identify the type of reaction, we need to understand the reaction components. In this case, sodium (Na) is reacting with water (H2O) to produce sodium hydroxide (NaOH) and hydrogen gas (H2).

During a single displacement reaction, an element replaces another element in a compound. In the given reaction, sodium (Na) displaces hydrogen (H) from water (H2O), forming sodium hydroxide (NaOH) and releasing hydrogen gas (H2).

Therefore, the reaction can be classified as a single displacement or substitution reaction.