These are substances that have a pH over 7 0 Alkaline based paper increases the longevity of paper Alkaline substances can be added to a material to neutralize acids or as an alkaline reserve or buffer for the purpose of counteracting acids that may form in the future A buffer may be added during manufacture or during the process of deacidification While a number of chemicals may be used as buffers, the most common are magnesium carbonate and calcium carbonate
Soils that are basic rather than acidic with a PH value greater than 7 0 They contain high amounts of various salts of sodium and/or potassium, together with other soluble minerals
Alkaline substances have a pH over 7 0 They may be added to a material to neutralize acids or as an alkaline reserve or buffer for the purpose of counter-acting acids that may form in the future A buffer may be added during manufacture of during the process of deacidification While a number of chemicals may be used as buffers, the most common are magnesium carbonate and calcium carbonate
Soil acidity affects a plant's ability to absorb nutrients Alkaline soil has a pH of more than 7 0 -- A soil with a pH between 7 5 and 8 0 is mildly alkaline; 8 0 to 9 0 soils are moderately alkaline; and above that, soil is considered highly alkaline Plants growing in alkaline (or basic) soil are less able to absorb phosphorus, iron, and manganese Areas tending to experience drought will often have alkaline soils In addition to adding organic material, soil can be made less alkaline by adding elemental sulfur
When the pH of a solution measures above 7 0 on the pH scale Alkaline (often referred to as "basic") is the opposite of acid
sometimes water or soils contain an amount of alkali (strongly basic) substances sufficient to raise the pH value above 7 0 and be harmful to the growth of crops
The condition of water or soil which contains a sufficient amount of alkali substances to raise the pH above 7 0
in lubricating oil, the property of the substance that give it the chemical character of a base Alkaline materials neutralize acids to prevent acidic and corrosive wear in internal combustion engines
(1) Having the properties of a base (2) Containing sodium and/or potassium in excess of the amount needed to form feldspar with the available silica; e g , an alkaline rock-in this sense sometimes written alkalic (3) Containing ions of one or more alkali metals (4) Waters containing more than average amounts of carbonates of sodium, potassium, magnesium, or calcium
Having a pH factor of more than 7; having a relatively low concentration of hydrogen ions (contrasted with acid, especially as a characteristic of soil)
relating to or containing an alkali; having a pH greater than 7; "alkaline soils derived from chalk or limestone"
The condition of water or soil that contains an amount of alkali substances (various soluble salts) to raise the pH above 7 0; when extreme, alkalinity is caustic
A type of battery able to sustain longer periods of current drain with greater storage life when compared to the standard carbon-zinc type
the opposite of acidic Alkaline materials have pH levels above 7 0 (neutral) Synonymous with the word basic
The presence of alkali in water or soil in amounts sufficient to raise the pH value above 7 0
Some soils are actually too alkaline for certain plant life. ¡Ù acidic + alkalinity al·ka·lin·ity A pH test measures the acidity or alkalinity of a substance. ¡Ù acidity. containing an alkali
Some soils are actually too alkaline for certain plant life. acidic + alkalinity al·ka·lin·ity A pH test measures the acidity or alkalinity of a substance. acidity. containing an alkali
Any of the elements of group II of the periodic table; they are low-density metals that react readily with water to form strongly basic hydroxides, and with many acids to form salts
(elec) A BATTERY that uses sodium or potassium hydroxide as an electrolyte, and nickel-oxide flakes and powdered iron or nickel-cadmium for its active plates F - accumulateur alcalin S - pila alcalina
Any of the six chemical elements in the second leftmost group of the periodic table (beryllium, magnesium, calcium, strontium, barium, and radium). Their name harks back to medieval alchemy. Their atoms have two electrons in the outermost shell, so they react readily, form numerous compounds, and are never found free in nature
The amount of bicarbonate, carbonate, and hydroxide compounds present in the water Total Alkalinity is a measure of the waters ability to resist changes in pH
Alkalinity is a measure of the concentration of bases in the water and the capacity of the water to accept acidity (I e it's buffering capacity) Alkalinity is usually measured as either mg/l (milligrams per litre) CaCO3 (Calcium Carbonate) or meq (milli-equivalents) 1 meq = 50 mg/l CaCO3 The ideal range of alkalinity for fish farming is 20 - 300mg/l Below 20mg/l the water will have a very low buffering capacity, and any acids that are washed into the water (for example after heavy rain has soaked through peat), will cause a big fall in pH Such fluctuations of pH are harmful to fish Water with low alkalinity can be treated with lime High alkalinity levels can sometimes lead to a condition in the fish called nephrocalcinosis
The capacity to buffer against pH drops The greater the alkalinity, the more stable the pH will be and the less likely that there will pH swings Alkalinity can be raised by adding a carbonate buffer material Alkalinity can also be maintained through the use of substance called kalkwasser
The acid-neutralizing capacity of water It is primarily a function of the carbonate, bicarbonate, and hydroxide content in water The lower the alkalinity, the less capacity the water has to absorb acids without becoming more acidic
a measure of the ability of a solution to absorb positively charged hydrogen ions without a significant change in pH Also referred to as buffering capacity Alkaline solutions have a pH greater than 7 0 (see pH)
The quantitative capacity of water or water solution to neutralize an acid It is usually measured by titration with a standard acid solution of sulfuric acid, and expressed in terms of its calcium carbonate equivalent A moderate amount of Alkalinity in your water is desirable because it reduces the effect of corrosion The EPA has not set a level for Alkalinity, but a level greater than 100 ppm is recommended
The capacity of water to neutralize acids This capacity is caused by the water's content of carbonate, bicarbonate, hydroxide and occasionally borate, silicate, and phosphate Expressed in milligrams per liter (mg/L) of equivalent calcium carbonate
A measure of the amount of carbonates, bicarbonates, and hydroxide present in water Low alkalinity is the main indicator of susceptibility to acid rain Increasing alkalinity is often related to increased algae productivity Expressed as milligrams per liter (mg/l) of calcium carbonate (CaCO3), or as microequivalents per liter (ueq/l) 20 ueq/l = 1 mg/l of CaCO3
The quantitative capacity of a water or water solution to neutralize an acid It is usually measured by titration with a standard acid solution of sulfuric acid, and expressed in terms of its calcium carbonate equivalent
Alkalinity means the buffering capacity of water; the capacity of the water to neutralize itself It prevents the water pH levels from becoming too basic or acid It also adds carbon to water Alkalinity stabilizes water at pH levels around 7 However, when the acidity is high in water the alkalinity decreases, which can cause harmful conditions for aquatic life In water chemistry alkalinity is expressed in ppm or mg/L of equivalent calcium carbonate Total alkalinity of water is the sum of all three sorts of alkalinity; carbonate, bicarbonate and hydroxide alkalinity
property related to the buffering capacity of the water, relates to the amount of acid which can be neutralized before the pH drops to a set value (see Ch 3) As a water pollutant, excessive alkalinity is usually due to dissolving salts from alkaline soil and rock Human contribution is often due to such activities as strip mining which expose the alkaline soil to groundwater
the measurement of constituents in a water supply which determine alkaline conditions The alkalinity of water is a measure of its capacity to neutralize acids See pH
Also more commonly called total alkalinity A measure of the pH-buffering capacity of water Also called the water's resistance to change in pH Composed of the hydroxides, carbonates and bicarbonates in the water One of the basic water tests necessary to determine water balance
This is the measure of a solution's resistance to changes in pH It is commonly measured as carbonate alkalinity or total alkalinity, and is expressed in meq, dKH, or ppm of C03 ions The alkalinity can be raised by adding a buffer
A pressure- and temperature-independent property of seawater that determines in part the carbon content of seawater Carbonate alkalinity is the sum of the concentration of bicarbonate plus two times the concentration of the carbonate ions Total alkalinity is the amount of acid required to bring seawater to a pH at which all dissolved inorganic carbon becomes freely exchangeable The alkalinity of the oceans is determined with potentiometric or normal titration techniques that detect and measure the presence of bicarbonate, carbonate, and borate ions (Source: Carbon Dioxide Information Analysis Center, 1990)
the capacity of water to neutralize acids, a property imparted by the water's content of carbonate, bicarbonate, hydroxide, and on occasion borate, silicate, and phosphate It is expressed in milligrams per liter of equivalent calcium carbonate (mg/l CaCO3)