Which of the following releases the proton in water? HOO HO HO HO CH3 OOH Ọ NH NH2 1 2 3 O 3, 6 O 1, 4, 5, 6 O 3, 4, 5, 6 O 1, 2, 5 HO NH, CH 5 H₂N CI

If HCI is added to each of the following substances, which will produce CO2 gas? KBr СаСОз NaOH HC2H3O2 O O O O

What is the [H30*] in a 175 mL sample of 0.0629 M KOH(aq)? O 2.78 x 10-14 mol L-1 O9.08 x 10-13 mol L-1 O 8.17 x 10-14 mol L-1 O 1.59 x 10-13 mol L-1 O 6.08 x 10-13 mol L-1

What is An for the equilibrium system: Na2CO3 (s) + CO2 (g) + H2O (g) =2 NaHCO3 (s)? O 2 О 1 O -2 O 1

Which one of the following salts, when added to water, would decrease the pH? O CSCN O LICH3COO O KHSO4 O Ba(CIO₂2) 2 NaBrO

Synthesis

2

Gaviscon active agent Al(OH)3 write out the balance chemical equation for the complete neutralization of one mole of active ingredient in Gaviscon with H+ ions

Chromium(VI) forms two different oxyanions, the orange dichromate ion, Cr2O72 , and the yellow chromate ion, CrO42 . (See the following photos.) The equilibrium reaction between the two ions is Cr2O72(aq)+H2O(l)2CrO42(aq)+2H+(aq) Explain why orange dichromate solutions turn yellow when sodium hydroxide is added.

What is the molar hydronium ion concentration in solutions with each of the following pH values? a. 4.22 b. 4.25 c. 4.50 d. 4.75