An Environmental Chemist Obtained a 200

Multiple Choice

An environmental chemist obtained a 200. mL sample of lake water believed to be contaminated with a single monoprotic strong acid. Titrating this sample with a 0.0050 M NaOH(aq) required 7.3 mL of the NaOH solution to reach the endpoint. If the size of the lake can be approximated as 1.1 km long by 2.3 km wide, and has an average depth of 10. m, estimate how many moles of the strong acid are present in the lake

A) 4.0 * 10⁶ moles of acid
B) 4.2 * 10⁶ moles of acid
C) 4.4 * 10⁶ moles of acid
D) 4.6 * 10⁶ moles of acid
E) None of the above