calculate the Ph of 0.001M HNO3
2.If the Ph of a solution is 4.5 what is its pOH?
3.Calculate the Ph of an aqeous solution of sulfuric acid is 5 x 10-5 mol/lit
4.Calculate the PH of 1 x 10-4 molar solution of sodium hydroxide.
5.Lemon juice has a Ph 2, What is the concentration of H+ ions.
6.An organic compound A is widely used as a preservative and has the molecular formula C2H4O2. This compound reacts with ethanol to form a sweet smelling compound B.
i). Identify the compound A
ii).Write the chemical equation for its reaction with ethanol to form cpd B iii). Name the process.
7. WRITE IUPAC NAME FOR THE FOLLOWING COMPOUNDS:
1.CH3-CH2-CH2-COOH
2.CH3-CO-CH2-CH2-CH3
3.CH3-CH2-CH2-CH(CH3)-CH2-OH
4.CH3-CH2-CH2-CH2-CH2-CHO
5.CH3-CH(OH)-CH2-CH3
6.CH3-CH=CH-CH2-CH3
WRITE MOLECULAR FORMULA FOR THE FOLLOWING:
1.3-METHY HEXANE
2.PROPANOIC ACID
3. 3-PENTANONE
4. 2-PENTENE
5. 2-METHYL BUTAN-1-OL
Answers
Answer:
1.0.001 M HNO3 = pH 2.0.
2.You are given that the pH = 4.5. Find the hydroxide ion concentration of a solution with a pOH of 5.90. To solve this, use a scientific calculator and enter 5.90 and use the +/- button to make it negative and then press the 10x key. On some calculators, you can simply take the inverse log of -5.90.
3. In aqueous solution fully dissociates to H+ and A−. pH of ... Example: Calculate the pH of 0.06 mol/L HCl. ... 03.10. 2018. 5. Calculating the pH of strong acid solutions.
4.
p
H
=
10
Explanation:
In water the following equilibrium operates:
2
H
2
O
(
l
)
⇌
H
3
O
+
+
H
O
−
As for any equilibrium, we can write the equilibrium expression:
[
H
3
O
+
]
[
H
O
−
]
[
H
2
O
]
=
K
'
w
Since
[
H
2
O
]
is huge, we can simplify this expression:
[
H
3
O
+
]
[
H
O
−
]
=
K
w
At
298
K
,
[
H
3
O
+
]
[
H
O
−
]
=
K
w
=
10
−
14
Taking
log
10
of both sides:
log
10
[
H
3
O
+
]
+
log
10
[
H
O
−
]
=
log
10
(
10
−
14
)
=
−
14
Now we can define
p
H
=
−
log
10
[
H
3
O
+
]
, and
p
O
H
=
−
log
10
[
H
O
−
]
.
And thus
p
O
H
+
p
H
=
14
(finally!)
Thus
p
O
H
of
1
×
10
−
4
m
o
l
⋅
L
−
1
NaOH
=
−
log
10
(
1
×
10
−
4
)
=
4
Since
p
O
H
+
p
H
=
14
,
p
H
=
10
5.pH is calculated by taking negative logarithm of hydrogen ion concentration. Acids have pH ranging from 1 to 6.9, base
6.Answer. (a) Compound A with molecular formula C2H4O2 is ethanoic acid, also called acetic acid. Its structural formula is CH3COOH. A dilute solution of acetic acid called vinegar is used as a preservative of pickles
,