Practice problem
Bases — Definition & Overview
By Deena Hauze
Traditional pretzel-makers used sodium hydroxide, NaOH, to create that crispy, crunchy crust we associate with pretzels. Also called lye, NaOH is a base with a pH of 14 that dissolves easily in water.
Lye dipped pretzels
Image source: By Ross Catrow CC BY SA-2.0, via flikr.com
Based on the given information, which options provide direct evidence that sodium hydroxide is basic?