Complex sentence: The tapered sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations by placing it under the buret and adding solvent and the indicator in Erlenmeyer flask.
Split into simpler sentences: The tapered sides and narrow neck of this flask allow the contents of the flask to be mixed by swirling, without risk of spillage, making them suitable for titrations. By placing it under the buret and adding solvent and the indicator in Erlenmeyer flask.