(ONLY ANSWER IF U R SURE PLZ) A scientist is performing a fermentation of bioethanol and the current pH is roughly 6.5. What should the scientist do to get the pH to the optimum value of 5.0? A. Increase the temperature, which will lower the pH.

B. Add an appropriate amount of acetic acid.

C. Adjust the airflow to allow more oxidation.

D. Add an appropriate amount of sodium hydroxide.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

What is the percentage of hydrogen in c2h4