1.
Chemistry
The pH of a solution and the concentration [H
+
] of hydrogen ions in the solution are related by the formula
. Find the concentration of hydrogen ions in a solution with a pH of 2.9.
A.
0.00068
B.
0.0013
C.
0.00032
D.
794.33
Hint
2.
Given that log
7
10
1.18, find log
7
1000.
A.
3.85
B.
1.64
C.
3.54
D.
2.54
Hint
3.
Given that log
8
10
1.11 and log
8
60
1.97, find log
8
6.
A.
1.16
B.
1.77
C.
0.86
D.
3.08
Hint
4.
Use log
3
4
1.26 to approximate the value of log
3
108.
A.
4.26
B.
3.78
C.
2.38
D.
36
Hint
5.
Solve the equation 2 log
6
x
– log
6
5 = log
6
125.
A.
312.5
B.
25
C.
no solution
D.
–25
Hint