Table 4. Calculations for standardization of sodium hyroxide Trial 1 Trial 2 Trial 3 [1] Tared mass of KHC8H4O4 (g) 0.372 0.391 0.364 [2] Burette reading of NaOH, initial (mL) 4.94 3.85 3.51 [3] Burette reading of NaOH, final (mL) 22.12 21.58 21.33 [4] Volume of NaOH, dispensed (mL) 17.18 18 17.82 [5] Molar concentration of NaOH (mol/L)

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.