PH 75 is the most acid.
pH 9 - pH 4 = pH 5 It is stronger by 5 pH.
Most acidic is substance of pH of 2, then of pH of 5 and the substance of pH 7 is neutral and the substance of pH 11 is basic
The lower the pH, the more acidic the solution is. Remember, pH 7.0 is H2O. As pH decreases below 7, the solution's acidity increases. As pH increase above 7, the basicity of the solution increases. Hence, in the choices you provided, pH 1.0 is most acidic.
pH 0 < acidic < pH 7 neutral = pH 7 pH 7 < basic < pH 14
20
1/103 = 0.001 M ========( pH 3 ) 1/105 = 0.00001 M ============( pH 5 ) As you see, a pH of 3 has a 100 times concentration of 5 pH ( 10 * 10 devalued ) This is the scale; logarithmic.
105+105=210.
105
The LCM is: 105
31% of 105= 31% * 105= 0.31 * 105= 32.55
105 over 1 105/100
22% of 105= 22% * 105= 0.22 * 105= 23.1
86% of 105= 86% * 105= 0.86 * 105= 90.3
105
12% of 105 = 12% * 105 = 0.12 * 105 = 12.6
The greatest common factor (GCF) of 105 and 210 is 105.