Deck 23 (441 - 460) Flashcards
1
Q
- PIC
A
2
Q
- Identify the redox reaction:
a. Mg + 2 HCl -> MgCl2 + H2
b. KOH + HNO3 -> KN03 + H2O
c. Pb(NO3)2 + 2 HBr -> PbBr2 + 2 HNo3
d. Ca(OH)2 + 2 HCl -> 2 H2O + CaCl2
A
Mg + 2 HCl -> MgCl2 + H2
3
Q
- PIC
A
4
Q
- Write the balanced equation for the following acid-base reaction:
_ H3PO4 + _ KOH -> ???
A
1 H3PO4 + 1 KOH -> KH2PO4 + H2O
5
Q
- How many grams of NaCl are needed to prepare 250 ml of a 1.5% saline solution?
Density p(1.5%) = 1.012 g/cm3
A
3.795 g
6
Q
- PIC
A
7
Q
- Which of these is not a solution?
a. blood
b. salt water
c. water
d. urine
A
water
8
Q
- PIC
A
9
Q
- Which of the following is not a chemical element?
a. magnesium
b. sulphur
c. air
d. oxygen
A
air
10
Q
- PIC
A
11
Q
- Which are the sublevels in an energy level of n = 3 ?
a. s, p and f
b. s, d and f
c. s, p and d
d. p, d and f
A
s, p and d
12
Q
- Calculate the pOH of a 0.01 mol.dm-3 HNO3 solution
A
pOH = 12
13
Q
- PIC
A
14
Q
- To which class of organic compounds does the following compound belong?
H3C-CH2-O-CH2-CH3
a. alcohol
b. ketone
c. aldehyde
d. ether
A
ether
15
Q
- Which substance is a Lewis acid in the reaction shown by the equation below?
BF3(aq) + F- (aq) <-> BF4- (aq)
a. BF3
b. F-
c. BF4-
d. none of the above
A
BF3
