What is the acid in the stomach? Chemistry Acids and Bases Acids and Bases 1 Answer Andrew B. Mar 4, 2017 #HCl# Explanation: Hydrochloric acid #HCl# forms a large component of it. Answer link Related questions How do resonance structures affect acidity? How does carbon dioxide change the acid-base condition of a solution? Why do strong acids have a low pH? Is neutralization a double replacement reaction? Why is NaH a strong base? Is HBr a strong acid? Is HF a strong acid? Why does neutralization occur? Do strong acids completely dissociate in water? How can I calculate pH of weak acid? See all questions in Acids and Bases Impact of this question 1642 views around the world You can reuse this answer Creative Commons License