If the pH is 2, what is the %HA at of a molecule has a pKa = 6? Report the answer to one decimal place. Your Answer: Answer units

Make a 100 ml of a 1M stock solution of NaCl (you will need the molecular weight of NaCl).

What would the concentration of acetic acid be if 0.70 M CH3COO was adjusted to the pH of 5.76? (K₂ of CH3COOH 1.75 x 10-5 M)

(please type answer).

How would I calculate the amount of each component in each solution?  Stock solutions provided: 0.5 M EDTA, pH 8 10% bromophenol blue 10% xylene cyanol Sucrose powder Tris powder Glacial acetic acid  Solution A: 50 mL of 50x Tris Acetate EDTA (TAE) Buffer 2M Tris Base 50mM EDTA, pH 8 11.4% (v/v) glacial acetic acid Solution B: 1L of 1x TAE Buffer 40mM Tris-acetate 1mM EDTA Solution C: 5mL of 10x Loading Dye 0.25% (w/v) bromophenol blue 0.25% (w/v) xylene cyanol 66.5% (w/v) sucrose 100mM EDTA, pH 8

(please type answer).

In 300-400 words (which is about 20 sentences, 1 longer paragraph, or 2 shorter paragraphs), please use your own words to summarize the chemical properties of water and explain two or more reasons why living things need water.

5

If there is an increase in the hydrogen ion concentration from 38 nmol.l-1 to 82 nmol.l-1, what does the pH change from and to?

The pH scale shows availability of reactive hydrogen ions (H+) in a liquid. The scale is logarithmic, so milk has 10 times as many H+ ions as pure water, for a given volume. How many more H+ ions does soda pop have compared to pure water? Write the number only.