What is the letter on the model titration curve of HPr that corresponds to the point where pH equals the numerical value of the pKa for HPr?

Identify two types of chemical bonding in the source of dietary potassium

Which statement best describes the flow of energy in this scenario

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?