H4X - pKa1 = 1.5

H3X 2 - pKa2 = 3.6

H2X 3 - pKa3 = 7.8

HX 4 - pKa4 = 10.9

X 5 - pKa5 = 11.5

8.67

5.45

13.45

How many moles of water will be produced when 8 moles of ethane are burned?

A buffer contains 0.010 mol of lactic acid (pka = 3.86) and 0.050 mol sodium lactate per liter of aqueous solution. a. Calculate the ph of this buffer.

Name of the unit and type of measurement indicated for 4.8 m

Which of the following techniques is most appropriate for separating solid silver chloride from an aqueous solution? a) Paper chromatography b) Filtration c) Titration using a burette and a strong acid d) Electrolysis e) Evaporating to dryness

According to Le chatelier principle, a change in pressure affects the chemical equilibrium of the reaction system under what condition? 1. The reactants and the products are in the solid phase 2. The reactants and the products are in a liquid phase.

Which best explains how Dmitri Mendeleev organized elements in his periodic table? O A. Elements were ordered based on their discovery date. O B. Elements were ordered based on their economic value. O C.

The rocks and minerals of the Earth consist of compounds.

Do the number of protons in an atom of an element always equals its atomic weight.

Calculate the [oh-] in a solution with a ph of 12.52.

Which of the following months would be the darkest at the South Pole? January December August February