Q&A on acidity

• Free acidity and total acidity

  Acidity=lg [C (H+)/C (OH -)] Alkalinity=lg [C (OH -)/C (H+)] Acid in solution=no ionized part+ionized part (PH of solution is affected by this part) --Total acidity -------------------- Free acidity The PH test paper is used to measure the free acidity (if it is 100% ionized acid, the PH test paper can measure the total acidity), and the total acidity needs to use drops

  Chemistry

  1 answer

• Olive oil acidity

  Consumption tips A senior practitioner in the industry pointed out that if a bottle of olive oil is pure, it is best to look at the acidity, which is used to measure the proportion of free fatty acids in every 100 grams of oil. If the acidity is too high, it is easy to oxidize, leading to rancidity of the oil and it is not edible. The acidity of virgin olive oil, super virgin olive oil and intermediate virgin olive oil is natural acidity, while the acidity of refined olive oil is artificial acidity. The quality of olive oil, from natural acidity

  Common sense of life

  1 answer

• What is the significance and principle of determination of total acidity, effective acidity and volatile acidity of organic acids

  In chemistry, the acid value (or neutralization value, acid value, acidity) represents the milligram number of potassium hydroxide (KOH) needed to neutralize 1 gram of chemical substance?. Acid value is a measurement standard for the number of free carboxylic acid groups in compounds (such as fatty acids) or mixtures. A typical measurement procedure is to dissolve a known sample in an organic solvent, titrate it with potassium hydroxide solution of known concentration, and use phenolphthalein solution as color indicator. The acid value can be used as the

  Chemistry

  1 answer

• What is the relationship between the effective acidity of Sprite and the total acidity?

  Effective and general means one belongs to the common and the other is the role of inclusion

  physics

  2 answers

• Is there any effect on the acidity of the sample when decoloring with decolorant is used in the acidity test

  It should have no impact. Because the decolorizing agents you mentioned, such as activated carbon, pectin, diatomite, etc., only absorb some pigments, functional groups and most solids in the solution, and do not destroy or absorb the inorganic and organic acids in the solution. Therefore, I think that the use of decolorizing agent in the acidity test has no effect on the acidity of the sample, or has little effect.

  humanities

  1 answer

• How to use the pH meter?

  It depends on what kind of acidimeter you are. There are written, portable and desktop acidometers. The method of use is similar. In order to make the data accurate, it is best to use the standard solution for calibration. The PH of the standard solution is 4.01, 6.86, (7), 9.18. After the standard solution is prepared, press the CAL key to insert the pH meter into the solution. The pH meter will automatically calibrate, and then you can directly measure the PH value of the solution. Different PH meter models have different button names. It is better to refer to the

  Common sense of life

  1 answer

• How to test soil acidity? Which brand of soil acidity recorder is good?

  The soil acidity recorder is composed of a numerical indicating ammeter, a metal sensor and a functional value switching device. That is, the hardware system with the metal sensor as the core, the metal sensor contacts the soil, and uses the current generated by the redox reaction in the chemical reaction. The current value is used to drive the cell data of different pH values and humidity values corresponding to the ammeter (no battery or other external power support method is required). TZ produced by Top Yunnong

  Buy and maintain a car

  1 answer

• What is the price of soil acidity meter? What are the calibration methods of soil acidity meter?

  Excessive acidity or alkalinity of soil is an important factor limiting plant growth and quality. Most plants are not resistant to excessive acidity or alkalinity of soil. Therefore, it is very important to know the soil pH and humidity. Soil pH meter is an instrument used to detect soil pH, which can be directly inserted into soil to measure soil pH, which is different from the traditional method of measuring soil pH, and is simpler to operate. Direct insertion into soil measurement can better reflect the actual situation of soil. Tuopu Yunnongtu

  architecture

  1 answer

• Maintenance of pH meter

  In addition to the use and maintenance of general electronic instruments, it is mainly the maintenance of reference electrodes. Each electrode shall be purchased with maintenance requirements, which shall be strictly followed. Please refer to the introduction of Shanghai Leici Instrument Factory. Acidity meter is called pH meter for short, which consists of electrode and electrometer. If the electrode can be properly maintained, the standard buffer solution can be prepared as required, and the meter can be operated correctly in use, the pH indication error can be greatly reduced, thus improving the chemical performance

  Engineering Technology Science

  1 answer

• Acidity is 1.0-1?

  http://wenku.baidu.com/link?url=IK -zE7dlXfGeBXkBP6ZP93YubNaNP2l11DN0Aw1X1z7rS8NKt58zE8fVbUHR8KGcTrPXR-orX1wYKZuOvfOhaphNACEtuV_UdcUvoNlyYUu This is the information of the library. You

  Chemistry

  1 answer

• How does the pH meter work?

  The above address contains the data of the pHS-2 acidity meter, including its principle, performance, use method, instrument maintenance and precautions, as well as the preparation of standard solution, and a schematic diagram, which is rich and detailed. There are four pages in total. You can go and have a look.

  Chemistry

  2 answers

• What are the components of soil acidity? What are the methods for measuring soil acidity and moisture?

  Excessive acidity or alkalinity of soil is an important factor limiting plant growth and quality. Most plants are not resistant to excessive acidity or alkalinity of soil. Therefore, it is very important to know the soil pH and humidity. Soil pH meter is an instrument used to detect soil pH, which can be directly inserted into soil to measure soil pH, which is different from the traditional method of measuring soil pH, and is simpler to operate. Direct insertion into soil measurement can better reflect the actual situation of soil. Tuopu Yunnongtu

  Chemistry

  1 answer

• What kinds of acidity regulators are there?

  The approved acidity regulators include: citric acid, adipic acid, potassium citrate, lactic acid, fumaric acid, hydrogen carbonate, trisodium tartrate, sodium hydroxide, citric acid, monosodium malate, potassium carbonate, potassium citrate, sodium phosphate, sodium citrate, sodium acetate, sodium citrate, hydrochloric acid

  Chemistry

  1 answer

• How to test the acidity of olive oil?

  Acidity alone is not enough to judge the quality of olive oil~ According to whether the olive oil you buy is super virgin olive oil, the grade of olive oil is classified as follows: Extra Virgin Olive Oil ≤ 0.8 Medium Virgin Olive Oil ≤ 2.0 Lampante Olive Oil ≤ 2.0 Refine olives

  Chemistry

  1 answer

• What are the methods of using soil acidity meter? How does the portable soil acidity meter measure soil moisture?

  How to use Topyunnong soil pH meter: 1. If the soil at the measuring point is too dry or too rich to measure the soil pH, water must be poured on the measuring point first, and the measurement shall be carried out 28 minutes later. 2. Before using the tester, use abrasive cloth to completely wipe and clean the metal absorption plate to prevent affecting the measured value. If the new product is not used and there is protective oil on the surface of the metal plate, it must be inserted into the soil several times, and the protective oil layer must be polished before use. 3. Acids

  Engineering Technology Science

  1 answer

• How much is a soil acidity meter? What are the usage methods of portable soil acidity meter?

  Use method of Topyunnong soil acidity meter: 1. If the soil at the measuring point is too dry or too rich to measure the soil pH, it is necessary to pour water on the measuring point and wait 28 minutes before measuring. 2. Before using the tester, use abrasive cloth to completely wipe and clean the metal absorption plate to prevent affecting the measured value. If the new product is not used and there is protective oil on the surface of the metal plate, it must be inserted into the soil several times, and the protective oil layer must be polished before use. 3....

  Common sense of life

  1 answer

• What are the measuring methods of soil acidity and moisture meter? What is the price of soil acidity meter?

  Excessive acidity or alkalinity of soil is an important factor limiting plant growth and quality. Most plants are not resistant to excessive acidity or alkalinity of soil. Therefore, it is very important to know the soil pH and humidity. Soil pH meter is an instrument used to detect soil pH, which can be directly inserted into soil to measure soil pH, which is different from the traditional method of measuring soil pH, and is simpler to operate. Direct insertion into soil measurement can better reflect the actual situation of soil. Tuopu Yunnongtu

  Chemistry

  1 answer

• What are the usage methods of portable soil acidity meter? What about the indicators of soil acidity meter?

  Functions and characteristics of TopYunnong portable soil acidity meter: 1. It can measure light intensity, water content, soil temperature and soil pH value 2. Large screen LCD user interface, LED backlight auxiliary lighting, convenient reading, easy operation and portability. 3. Temperature metric and English conversion function. 4. Low battery prompt function 5. Power saving automatic shutdown function, automatic shutdown without any operation for 5 minutes. Technical parameters of portable soil acidity meter:

  Common sense of life

  2 answers

• How to determine the acidity of honey?

  Acidity includes total acidity (titratable acidity), effective acidity (hydrogen ion activity pH) and volatile acid. The acidity of honey refers to the milliliters of 1 mol/L sodium hydroxide solution added to neutralize 100 grams of honey sample. When identifying honey with physical and chemical indicators, pH can be used as a measurement item. A simple method to determine pH is to use a pH meter. The specific operation method can refer to the assay method in the honey quality standard.

  Education/Science

  1 answer