Cambridge Secondary (7-9). Stage 8. MCE Science. Student Book - Unit 7: Exothermic and Endothermic Changes - Question 76

Ahmed added some dilute hydrochloric acid to a solution of sodium hydroxide. He measured the temperature of the sodium hydroxide solution before and after mixing. He observed that heat was given out.

Circle the name of the type of chemical reaction that takes place between hydrochloric acid and sodium hydroxide.