Decide whether each of the molecules in the table below is stable, in the exact form in which it is drawn, at pH = 12. If you decide at least one molecule is not stable, then redraw one of the unstable molecules in its stable form below the table. (If more than one molecule is unstable, you can pick any of them to redraw.) HO HO stable unstable stable unstable OH O stable stable unstable unstable Click and drag to start drawing a structure. m ©

The molecule (CH3)2N-PF2 has two atoms that can act as Lewis bases. With boron compounds, BH3 attachesto phosphorus, while BF3 attaches to nitrogen. Give your reasoning

Many free radicals combine to form molecules that do not contain any unpaired electrons. The driving force for the radical- radical combination reaction is the formation of a new electron-pair bond. Consider the formation of hydrogen peroxide. 2 OH(g) → H₂O₂(g) Write Lewis formulas for the reactant and product species in the chemical equation. Include nonbonding electrons. OH(g) Select Draw Rings More / ||| ||| Erase Q2 Q H₂O₂(g) Select Draw Rings More 3 S H Erase Q2 Q Question Source: McQuarrie, Rock, And Gallogly 4e - General Chemistry Publisher: University Science B

Arrange the Lewis acids GaCl3, BCl3 en AlCl3 in order of increasing acidity.

Chemistry

Phosphoric acid, H3PO4(aq),H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH and the concentrations of all species in a 0.150 M phosphoric acid solution. pKa1= 2.16         pKa2= 7.21         pKa3= 12.32 [H3PO4]= ? M [H2PO−4]= ? M [HPO2−4]= ? M [PO3−4]= ? M [H+]= ? M [OH−]= ? M pH=

Phosphoric acid, H3PO4(aq),H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH and the concentrations of all species in a 0.400 M phosphoric acid solution. pKa1: 2.167 pKa2: 7.21 pKa3: 12.32

Fill in the missing parts of the table below: pH POH [H3O*] [OH} 2.93 1.88 5.23 x 10-3 9.64 x 10 10 |1.01 х 10-6

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C chemical symbol, chemical formula or Lewis structure :0: || H-C-H Co H₂ H-C-H || H-C-H boiling point (Choose one) (Choose one) (Choose one) ✓ (Choose one) X Ś V 0 E

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance chemical symbol, chemical formula or Lewis structure B H:0: | || H-C-C-N- CH3 Br CaBr, H CH3 C H :0: H I IN H-C-C-C-H | | | D H H H CH₂- N― CH3 I CH3 boiling point (Choose one) v (Choose one) v (Choose one) (Choose one) ? Π ་ 00.