Solubility
Generally, cations and anions can coordinate or make ____molecules and create ___ surrounding the ion
4-6 water, a hydration shell
Name a strong acid and a strong base
Strong acids: HCl, HBr, HI, HClO4, HNO3
Strong bases: LiOH, NaOH, KOH, Ba(OH)
pH + pOH= ??
14, why?
The non-metal that makes Sulfuric acid is --- and the non-metal that makes Carbonic acid is----
Sulfur, Carbon
What are the two buffers in the human body? Where do they happen?
Open, the lungs
Closed, the cells
A patient came to the E.R. and found to be suffering from severe dehydration. A nurse should give IV of what solution?
Ringer's solution
Acidic solutions taste ------ whereas basic solutions taste -------
sour, basic
The pH is defined as _____ whereas pOH is defined as _____
-log[-H3O+], -log[OH-]
Group 2A metals, also known as alkaline earth metals after reacting with oxygen make compounds that when react with water make ____ bases
Mono, Di, or Tri?
Diprotic
A boric acid solution could be used as
(A)An acid (B) an antiseptic agent especially for eyes (C) a base (D) an antiseptic agent for teeth
B) an antiseptic agent especially for eyes
When a soluble ionic compound dissolves in water, water provides ____ energy, coordinates with the cation(s) via_____atom, and coordinates with the anion(s) via the _____atom.
(A) Coordination, hydrogen, oxygen (B) solvation, oxygen, hydrogen (C) solvation, hydrogen, oxygen (D) Solvation, hydration, nitrogen
B) solvation, oxygen, hydrogen
The function of HCl in our stomach is to digest
(A)Proteins (B) Carbohydrates (C) Lipids (D) all of them
D) all of them
If the pOH of a solution is 9.9, then its pH is _____ and it is a(an) _____ solution.
4.1, acidic
Phosphoric acid has the Ka = 7.5x10-3, whereas Formic acid has the Ka = 1.8x10-4. Which one is the weaker acid?
Formic acid
An Indicator is a large ---------- compound that shows ------- at different pH.
(A) Ionic, red (B) Molecular, different colors (C) Molecular, same color (D) Ionic, Blue
B) Molecular, different colors
You have added Calcium Nitrate in one test tube#1 containing water and Lead Sulfate in test tube#2 containing water. Mix them thoroughly. Which mixture will conduct electricity?
Calcium nitrate and Lead sulfate
Water can be an acid or a base. In pure water, [H3O+] = _____and [OH-] = ___ and it’s an ____ compound.
(A) 10-7 M, 10-7 M, acid
(B) 10-7 M, 10-7 M, amphiprotic
(C) 10-7 M, 10-7 M, basic
(D) 10-7 M, 10-8 M, acid
B) 10-7 M, 10-7 M, amphiprotic
What is the pOH of a solution containing 0.08M H2SO4?
pOH= 13.2
Metals react with oxygen to make ------, which when subsequently react with water, make ----.
Metal oxide, bases
When Sodium bicarbonate is used as an antacid, it makes -------, ------, and ------- in our stomach.
(A)NaCl, CO2, and H2O (B) KCl, CO32- , and NH3 (C) KCl, CO2, and H2O (D) NaCl, O2, and H2O
A) NaCl, CO2, and H2O
If 4 moles of MgCl2 are dissolved in 2 L of water. What will the osmolarity be?
3x4=12
1 mole of MgCl2 gives 3 particles, there are 4 moles
The SO42- originates from an acid, whereas NH4+ originates from a base. What will be the nature of SO42- and NH4+ ions?
(A) Strong conjugate base and weak conjugate acid (B) Weak conjugate base and strong conjugate acid (C) Strong conjugate acid and weak conjugate base (D) Weak conjugate acid and strong conjugate base
A) Strong conjugate base and weak conjugate acid
What is the pH of a solution containing 0.05 M sodium acetate and 0.005 M acetic acid? The Ka of acetic acid is 1.8x10-5.
(A) 4.73 (B) 5.73 (C) 6.75 (D) 1.8
B)5.73
First, let's calculate the pKa of acetic acid:
pka=−log(Ka)=−log(1.8×10−5)≈4.74
Next, plug in the concentrations into the Henderson-Hasselbalch equation:
pH =4.74+log(0.05/0.005)≈4.74+1≈5.74
Identify the answer below for the statement “metal+acid = salt + Hydrogen.”
(A)Li2O(s) + H2SO4(aq) = Li2SO4(aq) + H2(g) (B)MgO(s) + 2HNO3(aq) = Mg(NO3)2(aq) + H2O(l) (C) 2Al(s) + 2H3PO4(aq) = 2AlPO4(s) + 3H2(g) (D)Ca(OH)2(s) + 2HBr(aq) = CaBr2(aq) + 2H2O(l)
C) 2Al(s) + 2H3PO4(aq) = 2AlPO4(s) + 3H2(g)
Respiratory alkalosis is due to _____ concentration of CO2 in the blood plasma whereas, respiratory acidosis is due to ____ concentration of _____ in the blood plasma.
(A) Higher, lower, CO2 (B) Lower, higher, O2 (C) Higher, lower, O2 (D) lower, higher, CO2
D) lower, higher, CO2