Lemon juice has a pH around 2.5. Milk has a pH around 6.5-7. Which of the following statements about these two liquids is true?

You should change it to Catechol (ml) 0.2 0.2 0.2 0.2 ml Turnip extract (ml) 0.1 0.1 0.2 Buffer (ml) 1 2 3 4 H₂O₂ (ml) Distilled H2O (ml) 1.7 1.2 1.1 1.1 Total Volume 0.5 0.5 0.5 0.5 0.5 pH 7 pH 7 pH 7 pH 7 0 0.5 0.5 0.5 2.5 2.5 2.5 2.8

NOTE: translucent (positive for fats) and opaque (negative for fats) To test for lipids, when we put one drop of corn oil on a paper towel (positive control): what opacity (translucent or opaque) did you observe in the paper towel? Does that mean the substance is present or absent? To test for lipids, when we put one drop of distilled water on a paper towel (negative control): what opacity (translucent or opaque) did you observe in the paper towel? Does that mean the substance is present or absent? What is the purpose of having controls when testing for lipids in this experiment?

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.

Assuming ideal behavior, rank the solutions boiling points, 1 is lowest to 4 highest boiling point: 0.1 m CaCl2 0.1 m NaOH [Choose ] [Choose ] 0.025 m Al2(SO4)3 [Choose] 0.25 m C6H12O6 [Choose ]

Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =

The pH of the amino acid shown below is:

What is the empirical formula for C3H6O3? C3H6O3 C6H12O6 CH2O None of these

If I need to make upv3L of a 0.9 solution of CaCl2, how many grams will I need?