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What value is used to express the acidity or alkalinity of a system?
Wiki User
∙ 12y ago
Normally term,'PH' of a solution is used determine the strength of an acid which is nothing but the concentration of H+ ion concentration in a solution. ph= -log[H+] concentration.... since its -ve log hence smaller value of PH means it's more strong acid. ph=7 is value of water which is neutral. pH ranging below 7 are acids & above 7 are bases.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoThe pH scale. The pH scale goes from 0 to 14. Substances that have a pH of 7 are neutral, acids have a pH of less than 7, and bases have a pH of greater than 7.
Wiki User
∙ 13y agothis is an 8th grade skill but the answer is pH
Wiki User
∙ 12y agopH
(potential for Hydrogen ions)
Wiki User
∙ 14y agoAcid solution: pH under 7,00.
Wiki User
∙ 11y agoPH Scale
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Why might a scientist prefer to use Universal Indicator rather than a different indicator like litmus?
Litmus only differentiates between acidic and alkaline solutions. It does not give an accurate value of the degree of acidity of alkalinity. Universal Indicator can help measure the pH of the given solution as it does not just change from red to blue and vice versa, but in solution has a range of colours.
Define bit in microprocessor?
: A Bit is a digit in the binary number system. It can have two values, 0 or 1. In computer RAM and ROM memory, a bit is a small electrical switch which is either on (value 1) or off (value 0).
What is the deci system?
And by "deci system", do you mean: the prefixes added to units of measurement to change the value of something (metric system)? the Decimal System? which would be a question in the math section the Dewey Decimal System? which would go under a library section used to organize books If it's the first one: The metric system is a system based on the number 10. There are numerous prefixes that are adjoined to units of measurement to increase or decrease the base unit by 10 times the preceding/succeeding value. The most basic prefixes used in high school science classes are Kilo- x1000 the base unit Hecto- x100 " " Deco- x10 Deci- x1/10 Centi- x1/100 Milli- x1/1000
What is a pH test?
a pH test is a test for acidity To first answer this question, I'd like to explain what pH is. The pH is a number, by convention from 0-14, that describes the acid-base properties of some solution. The lower the number, the more acidic the substance, while the higher the number, the more basic. The terms "acidic" and "basic" are chemically relative here, as certain substances (water included) can be both acids and bases (in fact, pure water, by definition, has a pH of 7, which is considered neutral). The pH is derived by first taking the log to the base of 10 of the concentration of Hydrogen ions, H+, that is: log [concentration of H+] This will give a negative value because this concentration is usually miniscule. Since we want a positive value, we multiply by the negative sign, or: -log [concentration of H+] There is also a value called the pOH, which is based on the concentration of hydroxide ion, OH-, and is derived in an analogous way, but the scale is reversed, where small values of pOH signify lessacidity and more basicity. In practice, we use either an electronic device or a liquid indicator which changes color to indicate a certain pH value. Now it is important to understand one major aspect of the pH scale. Because we are taking the logarithm of the concentration of H+ ions, and then mutiplying it by the negative sign, when we go from a value of, say, 1 to 2 on the pH scale, the concentration of H+ decreases by a factor of 10. Conversely, if we go from a value of 2 to 1, the concentration of H+ increases by a factor of 10. And if we go from 3 to 1 on the pH scale, we actually have an increase in H+ (that is, acidity), of 100. The simple rule is to find the integer difference between the larger and smaller pH value, and then raise 10 to that power. This is the factor by which the smaller value is more acidic than the larger one. Again, keep in mind here that the smaller the pH the more acidic, but that this value increases by 10-fold from each value going down. The human blood is slightly basic, or about 7.4 on the pH scale. However, the stomach is usually very acidic (about a pH of 2) while the small intestine is slightly more basic (>7). Most natural organisms contain buffers, which are pairs of weak conjugate acid/bases that act to "buffer" or minimize the change in pH whenever a base or acid is added. However, all buffers have a pH range in which they effectively buffer; outside that range (either too acidic or too basic) they are not as useful. Acids (pH lower than 7) and bases (pH over 7) must be handled very carefully. To reduce acidity or basicity, one must reduce the H+ or OH- ion concentration, which is usually done by adding copious amounts of water. More water, less concentration, and therefore less acidity/basicity. People can also ingest some sort of buffer or "antacid", which is actually a weak base that "neutralizes" the acid.
What is gross calorific value and useful heat value of coal?
what is the differnence between gross calorific value and useful heat value
Were does pH come from?
The pH is the measure of the hydrogen ion activity in solutions. The value of pH determine the acidity or alkalinity of a solution.
What is soil pH?
Soil pH is the pH value of the particular soil mixture.AnswerIt is a measure of the degree of acidity or alkalinity in the soil. 7 is neutral on the scale.
What is the purpose of the litmus paper test?
Litmus paper test is done to check the pH value of a solution. pH is a measure of acidity and or alkalinity of a solution.
How does the pH value vary with the strength of acidity and alkalinity?
pH less than 7 indicates acid the lower the pH the stronger the acid. pH greater than 7 indicates alkalinity the higher pH the stronger the base.
What value is used to express the acidity or icity of a solution called?
The acidity and the basicity are expressed by pH (the negative logarithm of the hydronium ion activity).
What value is ued to express the acidity or bacity of a solution called?
The acidity or basicity are expressed by pH (the negative logarithm of the activity of hydronium ion).
What is alkalinity value?
The word alkalinity is defined by the ability that any substance has at neutralizing when it is mixed with an acid.
What the pH number of an indicator for the concentration of?
The pH value is an indication of the acidity/alkalinity of a solution. More precisely, the pH value is a representation of the concentration of hydrogen cations (hydronium ions) in a solution.
What is pH level of phosphorus chloride?
Phosphorus trichloride (PCl3) is a covalent compound and does not have a pH level. pH is a measure of the acidity or alkalinity of a solution and is applicable to aqueous solutions. PCl3 is a liquid compound and not soluble in water, so it does not have a pH value.
What is the system of measuring the strength of acid and bases?
The system of measuring the strength of acids and bases is called the pH scale. It measures the concentration of hydrogen ions (H+) in a solution. A pH value below 7 indicates acidity, while a pH value above 7 indicates alkalinity (basicity). The pH scale is logarithmic, meaning that each unit represents a tenfold difference in acidity or alkalinity.
Can pH value be related to acidity?
Yes to lower acidity you can add alkalines which increase Ph values
How you calculate the acidity value?
pH = - log[H3O+]
