Question

Pre-Lab Questions 1. What acid is required for proper digestion in the stomach? 2. What is the normal pH range of the stomach? 3. Describe two ways in which the stomach prevents acid from damaging its lining (called the mucosa). 4. Name two substances that can damage the mucosa. Describe how each works. S. Why does the reaction between carbonate-containing antacids and stomach acid produce a "burp 6. Why do we refer to the reaction between an antacid and stomach HCl as an example of neutralization? 7. Why do some antacids contain both aluminum and magnesium ions? 8. Why do liquid antacids and chewed antacid tablets increase the neutralization reaction rate when compared to whole tablets? 9. Under what circumstances are over-the-counter antacids considered safe and effective? 10. Under what circumstances should over-the-counter antacids be avoided? IN1741 scientific, Inc. All Rights Reserved. Reproduction permission is granted only to science teachers who have purchased How Powerful Is Your Anta r Op of this material may be reproduced or transmitted in any form or by any means, electronic or mechanical, including, but not limited to photocopy record storage and retrieval system, without permission in writing from Flinn Scientific, Inc.

Answer 1

Hydrochloric acid (HCl) which is present in gastric juice is required for proper digestion in the stomach Normal pH range = 1.5 to 3.5 ( Two ways :- 2 The surface epithelial cells in mucega membrane secretes bicarbonate lang celice neatralises the quare effect of Mel. 6 mucega membrane is made up of tight janeton which prevent acid from spilling and disolveig the mucega. 9 @ Excers congumphon of alconal con desolve mucoga as both mucoga and alcohal are organic suhsteenes so désolue easily 6 Eating spicy food - Congrening spicy food secreter more Hellgastic juice) which in turn (damages mucosa lineng.