pH = 14 - pOH; pH = 14 - 3 = 11 = pH

Acidity and alkalinity are two extremes that represent chemical substances. Mixing acid and base may counterbalance or offset these extreme effects. Substances that are neither acidic nor alkaline are neutral

pH is a measure of the acidity or basicity of a substance. The pH range from 0 to 14.7 is neutral. A pH less than 7 is acidic. PH above 7 is alkaline

Since pH is logarithmic, each pH value less than 7 is 10 times higher than the next higher value. For example, the acidity at pH 4 is 10 times the pH 5 and the acidity is 100 times (10 × 10) the pH value. The argument is alkaline rather than the next lower overall value. For example, pH 10 is 10 times the pH 9, alkalinity is 100 times (10 × 10) pH.

Pure water is neutral. However, when chemicals are mixed with water, the mixture can become acidic or alkaline. Examples of acidic substances are vinegar and lemon juice. Alkaline, magnesium oxide, alkaline substances such as ammonia

The values ​​of Kw, H +, and OH concentrations indicate that equilibrium supports reactants (water molecules). In other words, only very small amounts of H + and OH - ions are present.

When acid (H +) is added to water, the equilibrium moves to the left and the OH - ion concentration decreases.

Principle of water balance: The product of the concentrations of H + and OH - ions (addition of exponent) must always be equal to 10-14

In any solution, H + and OH - ions are always present. If H + is too much, the solution becomes acidic. If there are too many OH ions, the solution becomes alkaline.

The concentrations of hydrogen ions and indirect hydroxide ions are given by pH. pH is defined as the negative logarithm of hydrogen ion concentration. The expression is as follows.

The logarithm of the number, expressed as a multiple of 10, is simply the index of the number containing the symbol. Please refer to the table on the left for consideration. Using a calculator find a way to find a logarithm of a number that is not a multiple of 10. This method is not explained here

pH (0-14) is the complete set of pH values ​​representing the concentration of H + and OH - ions in water. The graph on the left shows some relationships that summarizes much of the discussion so far.

Soil pH or soil reaction is an indicator of soil acidity or alkalinity as measured in pH units. Soil pH is defined as the negative logarithm of hydrogen ion concentration. The pH is 0 to 14, pH 7 is the neutral point. As the amount of hydrogen ions in the soil increases, the pH of the soil decreases and becomes more acidic. When pH goes from 0 to 0, the soil becomes increasingly acidic, and when pH goes from 7 to 14 the soil becomes more alkaline or alkaline. Many dyes discolor as pH increases or decreases, making it possible to estimate soil pH. As soil pH was measured, the sample was saturated with dye for several minutes and color was observed. This method is sufficiently accurate for most purposes. The Garden Store offers a kit (pH) that contains the necessary chemicals and color charts.

Soil acidity is measured in units of pH. Soil pH is a measure of hydrogen ion concentration in soil solution. The lower the pH of the soil, the higher the acidity. The pH is measured on a logarithmic scale of 1 to 14 and 7 is neutral. Soil acidity at pH 4 is 5 times soil pH, soil pH is 6 times, soil pH is lower than soil pH 6. Low pH values ​​in soil may affect microbial activity, the most obvious is It is a decrease in legumes. The nitrogen deficiency resulting from plant root nodulation may be manifested by the redness of the stems and petioles of herbaceous leguminous plants, or by yellowing and death of the oldest leaves of cereal beans. Rhizobium is drastically reduced in acidic soils. Some grass legume plants may not survive because the root nodule population can not normally root nodulate roots and form functional symbioses

Ph is a measure of the acidity or alkalinity of the solution and is measured on a scale of 0-14. The lower the pH, the stronger the acidity of the solution, which in turn will affect our body's function. This is very important to our understanding; the index of the ph value is the index of 10 - so the small difference in the ph value will lead to a big difference in our health. For example, the difference in pH means ten times the acidity, the difference of 2 means 100 times the acidity, so if you lower the body's natural pH from 35 to 9, it looks a bit different. Under that value, the body can no longer survive and death will happen. In the range of 34 - 6.9, the body gradually lost happiness