Hydrogen fluoride gas (HF) and sodium hydroxide (NaOH) react in a test tube. They form water and sodium fluoride (NaF). Which type of reaction occurred in the test tube?

Question

Single-replacement reaction
Decomposition reaction
Synthesis reaction
Acid-base reaction

Answer 1

This is an acid-base reaction. In the reaction, hydrogen fluoride (HF) acts as an acid and sodium hydroxide (NaOH) acts as a base. The HF donates a proton (H+) to the NaOH, forming water (H2O) and sodium fluoride (NaF).