A patient is suspected of having low stomach acid, a condition known as hypochlo

Question

A patient is suspected of having low stomach acid, a condition known as hypochloridia. To determine whether the patient has this condition, her doctors take a 17.00 mL sample of her gastric juices and titrate the sample with 0.000178 M KOH. The gastric juice sample required 6.92 mL of the KOH titrant to neutralize it ridht ote the ph of the g astric hauce saimple. Assume the sample contained no ingested food or drink which otherwise interfere with the titration. Number For the patient to be suffering from hypochloridia, the pH of the gastric juices from the stomach must be greater than pH 4. Does the patient have hypochloridia? Yes O No O Unable to determine

Explanation / Answer

1)

millimoles of KOH = 6.92 x 0.000178

                             = 1.23 x 10^-3

millimoles of KOH = millimoles of gastric juice

    1.23 x 10^-3 = 17 x M

M = 7.25 x 10^-5

concentration of gastric juice = 7.25 x 10^-5 M

pH = -log [H+] = -log ( 7.25 x 10^-5 )

pH = 4.14

2)

yes

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