Ca(s) + 2 H2O(l) Ca(OH)2(aq) + H2(g)

acid-base
double-displacement
gas evolution
oxidation-reduction
precipitation
single-displacement
synthesis

whichs one(s) is it??

thanks

gas evolution

Also a redox reaction.

its not also a precipitation os single-displacement??

or acid- base? because i did gas evolution

oxidation-reduction
precipitation
single-displacement

but got it wrong so I am thinking either one of those has to be taken out and/or acid-base added

Depending upon how much Ca reacted, it could be pptn since Ca(OH)2 is not all that soluble.

And it can be single replacement. You are replacing H with Ca.

could it also be an acid-base?

I got it:) it was just not a precipitate:)

Thankyou sooooo much:)

If you use the right definition, yes it can be an acid/base reaction.

To determine the type of chemical reaction that is occurring in the given equation, you need to analyze the reaction and identify the observable changes. Let's break down the reaction:

Ca(s) + 2 H2O(l) -> Ca(OH)2(aq) + H2(g)

1. Acid-base reaction: In an acid-base reaction, an acid reacts with a base to form water and a salt. This reaction does involve the formation of water and a salt (Ca(OH)2), but there is no explicit acid and base mentioned. So, it is not an acid-base reaction.

2. Double-displacement reaction: In a double-displacement reaction, the cations and anions of two compounds switch places to form two new compounds. In this equation, Ca and OH ions combine to form Ca(OH)2, and H and H2O combine to form H2. Therefore, it can be classified as a double-displacement reaction.

3. Gas evolution reaction: A gas evolution reaction occurs when a gas is released as a product. In this equation, H2 gas is produced. Therefore, it can also be classified as a gas evolution reaction.

4. Oxidation-reduction reaction: Oxidation-reduction reactions involve the transfer of electrons between reactants. Since the equation shows no change in oxidation states, it is not an oxidation-reduction reaction.

5. Precipitation reaction: Precipitation reactions involve the formation of an insoluble solid (precipitate) when two aqueous solutions are mixed. In this equation, Ca(OH)2 is formed, which is an insoluble solid when aqueous. Therefore, it can also be classified as a precipitation reaction.

6. Single-displacement reaction: In a single-displacement reaction, an element replaces or displaces another element from a compound. This equation does not involve this type of reaction.

7. Synthesis reaction: Synthesis reactions occur when two or more substances combine to form a new compound. Although Ca(OH)2 is formed, the equation does not show the simple combination of two substances.

Based on the analysis, the given equation can be classified as a double-displacement reaction, a gas evolution reaction, and a precipitation reaction.