Heather is doing an acid-base reaction. She has 25.00 mL of hydrochloric acid of unknown concentration in a flask. She wants to add a basic solution to the acid drop by drop, until all the acid has reacted. Which tool would be best for adding the basic solution dropwise and for most precisely measuring the volume of solution added?

A buret is designed to dispense liquid in a controlled, dropwise manner and measure the volume delivered precisely. That makes it the best tool for adding the basic solution until the hydrochloric acid has reacted. A graduated cylinder is less precise, while an eye dropper and a beaker do not measure delivered volume as accurately.

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