Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Calculate theH + concentrationmol / L) in the stomach acid. Calculate the volume of stomach acid needed to dissolve 1.0 g of tooth enamel. ?
Frequent contact with stomach acid in case of vomiting or acid regurgitation will dissolve the tooth enamel. Therefore, severe acid damage to the teeth is often seen in people suffering from bulimia. The chemical reaction of the solution of tooth enamel, Ca10 (PO4) 6 (OH) 2, with acid can be considered as an acid-base neutralization reaction:
Ca10 (PO4) 6 (OH) 2 + 8H + → 10Ca2 + + 6HPO42- + 2H2O
In this task, stomach acid is considered as an aqueous solution of HCl (hydrochloric acid) with pH = 2. The molar mass of tooth enamel, Ca10 (PO4) 6 (OH) 2, is 1000 g / mol.
A. Calculate the H + concentration (in mol / L) in the stomach acid.
B. Calculate the volume of stomach acid needed to dissolve 1.0 g of tooth enamel.
1 Answer
- davidLv 72 months ago
a. pH = 2.0 >>> [H+] = 10^-2.0 = 0.010 M
b. === You can do this ====
find molar mass of Ca10 (PO4) 6 (OH) 2 = A
. . . . given as 1000g/mol
(1g/1000g/mol) = 0.001 mol
net start with reciprocal of molar conc. in part a./0
(1L/0.001mol) X (8mol / 1mol) X 0.001mol
= 8 L of stomach acid