The grout that binds the tiles together and to the wall needs to be gently removed.
Removing old tile from a kitchen wall.
How to remove ceramic wall tile without damaging drywall.
Work the grout scraper in a downward motion and work side to side to gently loosen the tile from its hold against the wall.
Removing wall tiles is different and more difficult than removing floor tiles because wall tiles are typically set very close together with minimal grout lines.
A grout scraper can get between the ceramic without cracking them and causing serious damage when you remove the tile backsplash.
Once the tile is down take a 5 in 1 tool and scrapper to remove any excess grout.
Since they are available in a wide.
With the removal of the one tile keep going under the surrounding tiles gently popping the tile from the wall by prying it from the wall using the scraper and hammer.
Once you have removed the tiles you will see there is an adhesive beneath that is either rock hard or semi soft.
Carefully use the hammer and putty knife to chisel off the tiles without gouging the drywall.