You prepare a buffer solution from 10.0 mL of 0.100 M MOPS (3‑morpholinopropane‑1‑sulfonic acid) and 10.0 mL of 0.074 M NaOH . 0.074 M NaOH. Next, you add 1.00 mL of 3.51 × 10 − 5 M 3.51×10−5 M lidocaine to this mixture. Denoting lidocaine as L, calculate the fraction of lidocaine present in the form LH +

The fraction of lidocaine is 0.999

Explanation:

The number of moles of MOPS:

The number of moles of NaOH:

In 20 mL of solution, the molarity is:

The acid form is:

1x10⁻³ - 7.4x10⁻⁴ = 2.6x10⁻⁴moles

About lidocaine, the pKa is:

Ka = 1x10⁻¹⁴/8.7x10⁻⁷=1.15x10⁻⁸

The fraction of lidocaine is:

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chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.