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pH Levels
pH levels are the measure of activity of hydrogen.
2,503 Questions
What is the pH value and colour on pH paper of dilute lemon juice?
It depends on its nature either it is concentrated or dilluted but most of the time it shows red colour on pH paper
What are weak acids or weak bases that can react with strong acids or bases to keep the pH?
Solutions containing these mixtures are called buffers.
What is the PH of lactic acid?
As with any acid, that depends entirely on its concentration. The greater the concentration (until saturation) the lower the pH.
Lactic acid is a "middle of the road" weak acid; all in equal concentrations, lactic acid is stronger than citric, weaker than acetic, and about the same as formic.
What happens when the pH solution is lower?
When adding a strong acid to an acidic solution pH decreases. Adding a strong base to an acidic solution the pH increases.
What color does red cabbage juice change depending on the pH?
Cabbage contain Anthocyanins called Cyanidin. These are responsible for changing color with pH. Changing the pH affects the shape of the molecule which, in turn, changes its wavelength absorption.
What is the strongest base listed on the pH scale?
There is no definite answer to this, but sec-Butyllithium can rip a proton from just about anything.
A methanide compound (one with a C4- anion), in theory, would blow sec-Buyllithium out of the water.
No one knows for sure what the strongest bases in the world are -spirit967
Which label would best describe a solution with a pH of 11?
a buffer is wrong, it is basic or alkaline, depending on the choices
A pH level between 6.5 and 8 is considered healthy for human body. In a pH balanced body, urine is slightly acid in the morning, (pH = 6.5 - 7.0) generally becoming more alkaline (pH = 7.5 - 8.0) by evening in healthy people primarily because no food or beverages are consumed while sleeping.
What is the pH of peppermint candy?
There are far too many variable to give an answer to this. The pH will depend on the pH of the water used, the "mint" used, of the soil in which the "mint" was grown, and any additions to the beverage.
What is the colour of HCl on pH paper?
The color of Ph paper is supposed to change, depending on the Ph level of the liquid you placed it on. The color is dependent as well. When purchasing Ph paper, it comes with a guide on the box. It is best to use that.
How did changing the pH effect the action of catalase?
Catalase work optimal in pH 7. Enzyme work specificly on certain pH. If change in pH occurs, it will slowing down the reaction rate.
If the solution is too acidic (low pH value) or too basic (high pH value) the catalase is inactive - no longer functions as an enzyme. So that's why your cells should be neutral (pH 7). Our bodies are creating Hydrogen peroxide during normal metabolic events and catalase is present in the peroxisomes of nearly all human cells. There, it serves to protect the cell from any toxic effects by catalyzing the decompostion of H2O2 without the production of Oxygen free radicals.
Catalase takes two molecules of hydrogen peroxide and converts them to two water molecules plus a molecule of oxygen gas. Hydrogen peroxide is a toxic molecule.
Amount of solution in test tube is called the controlled variable. Controlled variables must be carefully monitored and kept equal in your experiments - otherwise they could mess up your experiment by making your results false or unreliable.
What is the pH measurement in water?
pH (lower case "p") is the negative logrithm (to the power 10) of the hydrogen ion concentration in an aqueous solution. pH ranges from 0 to 14, with 7 being neutral, lower values acidic, and higher values basic (or alkaline).
What is the solution of a pH lower than the pH of distilled water?
pH value of distilled water would be 5,6 and 7 as interaction with the atmosphere allows carbon dioxide to dissolve into it, forming carbonic acid.
salt on its own has no ph value but , when mixed in water the ph value of common salt is 7 and it is neutral.
It is important to know the PH of various substance so as to prevent damage to the human beings and certain materials. The knowledge of PH is also important in environmental and water analysis.
A pH number is a figure which expresses the acidity or alkalinity of a liquid, and uses a scale in which 7 represents neutral, lower numbers represent acidic substances, and higher numbers represent alkaline substances. If the substance is acidic, it will have more hydrogen ions in it, while if it is alkaline, it will have more hydroxide ions in it. Mathematically, the scale is logarithmical, with the formula being -log 10 c, where c represents the hydrogen ion concentration in moles per liter.
