Question

How much 5 m koh must be added to 1.0 l of 0.1 m glycine at ph 9.0 to bring its ph to 10.0?

Answer 1

To determine how much 5 M KOH is needed to raise the pH of a glycine solution from 9.0 to 10.0, the Henderson-Hasselbalch equation is used. However, the pKa value of glycine is essential for this calculation and is not provided, making it impossible to give an accurate answer without it.

Step-by-step explanation:

The question is asking how much 5 M KOH needs to be added to 1.0 L of 0.1 M glycine at pH 9.0 to raise the pH to 10.0. The adjustment of pH in this case involves a buffer system, as glycine has an amino group that can accept protons and a carboxyl group that can donate protons, making it an amphoteric substance.

To solve this problem, you would typically use the Henderson-Hasselbalch equation to calculate the required moles of KOH to adjust the pH. The pKa value of glycine (which you need to determine the actual ratio between the conjugate acid and base forms of glycine) is not provided in the question and is essential to the calculation. Without this information, it is not possible to accurately determine the amount of 5 M KOH needed.

A similar calculation provided for a buffered solution in the reference mentions adding 10.0 mL of 1.0 M NaOH to a buffer and observing a slight pH change. In the unbuffered solution, a significant pH change is observed, signifying the buffer's capacity to resist changes in pH.

Answer 2

If a mother cow loses weight during her last trimester, her calf is in danger of suffering from "Weak Calf Syndrome."

This condition is characterized by the birth of calves that are weak, underweight, and less vigorous. It arises from inadequate nutrition or weight loss of the cow during the crucial final trimester, a period when the majority of fetal growth occurs.

The syndrome can lead to various challenges, including difficulty in standing and nursing, reduced immunity, and higher susceptibility to diseases. Adequate nutrition and management of the pregnant cow are essential to prevent this condition and ensure the health and viability of the newborn calf.