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Part D: Comparing Antacids

Have you ever taken an antacid for relief heartburn? Stomach acid is approximately $0\mathrm{.}36MHCl.$ Antacids such as Tums are often taken to treat heart burn. Reaction between an antacid and stomach acid is a neutralization reaction. In this exploration, we will use simulated stomach acid to pit several antacids against each other to see which is the most potent.

Materials: $0\mathrm{.}36MHCl,$ beakers, $pH$ strips, tums, Alka$-$Seltzer

Experiment:

Place $20ml$ of stomach acid $(0\mathrm{.}36MHCl)$ in two beakers and $B$

The chemist measures the $pH$ of the acid in beakers. $pH$ value of acid is

Crush tablet of Tums, one at a time and add it to beaker A$.$

Measure $pH$ of solution using $pH$ strip.

Keep adding tablets, one at a time until $pH$ of solution is $7.$

Repeat the steps $2-6$ using Alka$-$Seltzer, one at a time to beaker $B,$ one at a time, until the $pH$ of the solution is $7.$

The chemist records the values into the table below.

Table $4$:

$\backslash$table$[[\backslash$table$[[$Brand name of$],[$Antacid$]],\backslash$table$[[$Total number of$],[$tablets required to$],[$neutralize simulated$],[$stomach acid$]],\backslash$table$[[$Active ingredient$],[($research online$)]],\backslash$table$[[$Active ingredient$],[$amount per tablet$]]],[$Tums$,,,],[$Alka$-$Seltzer,,,$]]$

Questions:

In terms of acid base chemistry, are the active ingredient of antacids considered acids or bases?

Using the acid$/$base terminology we learned this week, what causes the $pH$ change of the stomach acid?

Active ingredient ca

$3.$ Calculate the total amount of active ingredient required by multiplying the amount of active ingredient per tablet by the number of tablets used. Show your work in the space given below.