Good evening everyone,
After visiting three home improvement stores for advice and still feeling unsure (since I received three different recommendations), I’m hoping to get some tips here.
We have removed tiles from the floor. What remains is the tile adhesive (see photos). Using a 7cm (3-inch) wide chisel hasn’t been very effective because the adhesive is extremely stubborn and doesn’t come off easily. The adhesive is about 3–4mm (0.1–0.15 inch) thick and covers a spacious area of 70m² (750 sq ft). Afterwards, 60m² (645 sq ft) of parquet flooring and 8m² (86 sq ft) of tiles will be installed here.
What would you recommend? Many thanks in advance!

After visiting three home improvement stores for advice and still feeling unsure (since I received three different recommendations), I’m hoping to get some tips here.
We have removed tiles from the floor. What remains is the tile adhesive (see photos). Using a 7cm (3-inch) wide chisel hasn’t been very effective because the adhesive is extremely stubborn and doesn’t come off easily. The adhesive is about 3–4mm (0.1–0.15 inch) thick and covers a spacious area of 70m² (750 sq ft). Afterwards, 60m² (645 sq ft) of parquet flooring and 8m² (86 sq ft) of tiles will be installed here.
What would you recommend? Many thanks in advance!