[DOC] [TLE] pH Scale - Chemistry Department - Elmhurst College [PAR] For example, pH 4 is ten times more acidic than pH 5 and 100 times (10 times ... 
more alkaline (another way to say basic) than the next lower whole value. ... If 
base ( OH-) is added to water, the equilibrium shifts to left and the H+ 
concentration decreases. ... BOTH H+ and OH- ions are ALWAYS PRESENT in 
any solution. [DOC] [TLE] Acids, Bases, & the pH Scale - Science Buddies [PAR] What does it mean for a solution to be acidic or basic (alkaline)? ... Now there are 
more hydrogen ions than hydroxide ions in the solution. ... In order to deal with 
these large numbers more easily, scientists use a logarithmic scale, the pH scale. 
... It's a lot easier to use a logarithmic scale instead of always having to write... [DOC] [TLE] pH is the Measure of Solution Acidity - Chemistry [PAR] Addition of a strong acid cannot make any solution more basic! ... "If Ka is less 
than 0.001 (10-3) and c is at least 0.01 M, the approximation can be made. [DOC] [TLE] Acid, Base, and pH Tutorial [PAR] The greater the concentration of OH- ions the stronger the base. ... **Solutions 
containig bases are often called alkaline. ... to neutralize each other if an equal 
number of hydrogen and hydroxide ions are present. ... Any pH number greater 
than 7 is considered a base and any pH number less than 7 is considered an 
acid. [DOC] [TLE] pH, Buffers, Acids, and Bases - Boundless [PAR] Acids dissociate into H + and lower pH, while bases dissociate into OH - and 
raise ... Buffers are solutions that contain a weak acid and its a conjugate base; 
as such, ... having a pH greater than 7; basic ... By convention, scientists refer to 
hydrogen ions and their concentration as if they were free in this state in liquid 
water. [DOC] [TLE] Chemistry: The pH Scale - Fact Monster [PAR] Solutions with a pH less than seven are acidic. Solutions with a pH greater than 
seven are basic. If a solution has a pH exactly equal to seven, it is neutral. ... 
Though a solution with a pH of 7.001 is basic from a chemical standpoint, it's very 
... in acid and blue in base) and phenolphthalein (pronounced "fee-no-thay-leen,"
... [DOC] [TLE] pH - Wikipedia [PAR] In chemistry, pH is a numeric scale used to specify the acidity or basicity of an 
aqueous solution ... Solutions with a pH less than 7 are acidic and solutions with 
a pH greater than .... For instance, if one wishes to measure the pH of a seawater 
sample, the ... where H+ is the chemical potential of the hydrogen ion, oH+ is 
its... [DOC] [TLE] What pH Numbers Are Considered Acidic, Base & Neutral? | The ... [PAR] The pH scale, which ranges from 0 to 14, indicates how acidic or alkaline a 
material is. ... if a Solution Is Neutral, Base or Acidic"  Science Experiments on 
pH Levels ... Each pH value is 10 times more or less acidic or alkaline than the 
number... [DOC] [TLE] What is the pH Scale?, explaining indicators colours, acids, alkalis ... [PAR] pH Scale, indicators, acids, alkalis (bases), neutralisation its ionic theory 
introduction ... the more acid it is, the greater the pH number, the more alkaline it 
is, and if the pH is ... Acidic solutions have a pH of less than 7, and the lower the 
number, the .... for ANY neutralisation involving the reaction between an acid and 
alkali is. [DOC] [TLE] Hydrogen Ion Concentration and pH [PAR] A solution with a concentration of hydrogen ions higher than 10-7mol/L is ... pH=-
log[H+], a pH of 7 is neutral, a pH less than 7 is acidic, and a pH greater ... 
Household drain cleaners often contain lye, a very alkaline chemical that is 
reactive. [DOC] [TLE] Acid or Alkaline

Question: Any solution with a pH less than this number is acidic; if it's more, it's alkaline
Answer: seven