Acids
The pH of a 1.0 x 10-⁴M HCl solution
What is 4?
If hydrochloric acid and sodium hydroxide react, these two products are formed. HCl + NaOH→ ______+_____
What is NaCl + H₂O
The initial sample of an unknown acid is 3.50 x 10-3 M and has a pH of 2.90. Calculate the value of Ka
7.1 x 10-4
The pH of an acid ranges from _____ to ______
0-6.9
The pH of base ranges from ____ to _____
7.1 to 14
A 30.0 mL solution of 0.200 M HCl is mixed with 25.0 mL of 0.300 M NaOH. What is the resulting pH of the solution?
pH = 12.4
Calculate the pH of 0.50 M H2S (Ka=9.1x10-8)
3.67
A substance that ionizes completely in aqueous solutions and produces H₃0+ ions.
What is a STRONG ACID
A substance that doesn’t ionize completely, but produces OH- anions
What is a WEAK BASE
The value of the ion-produced constant of water (Kw)
1.0 x 10-14
Find the initial concentration of a solution of NH3 (at pH=11.33) (Kb=1.8x10-5)
What is 0.26 M
Water is a neutral solution with H+ concentration of
1.0 x 10-7
Name two characteristics of bases
tastes bitter, feels slippery, produces OH- ions in solution...
4 grams of NaOH is equal to how many moles?
4g /40g = 0.1 moles
Calculate the pH of 0.35 M KOH.
13.54
Write the general expression for the Ka of acetic acid CH3COOH.
ka=[H+][CH3COO] / [CH3COOH]
Write the general expression for the Kb of ammonia
Kb=[NH4+] [OH-] / [NH3]
In the reaction H2SO4+2KOH→K2SO4+2H2O, if 10 grams of sulfuric acid reacted in the solution, how many moles of potassium hydroxide is it equal to?
moles of H2SO4= 10 g / 98 g = 0.102 mol
[0.102 / 1] x 2 =0.204 mol of KOH
A 25.0 mL solution of 0.200 M hydrochloric acid (HCl) is neutralized by a 0.100 M sodium hydroxide (NaOH) solution. What volume of NaOH is required to completely neutralize the acid?
50 ml