Sodium hypochlorite is alkaline, and household bleach also contains NaOH to make the solution even more alkaline. Two substances are formed when sodium hypochlorite dissolves in water. These are hypochlorous acid (HOCl) and the hypochlorite ion (OCl-), with the ratio of the two being determined by the pH of the water.
Considering this, what is the pH level of bleach?
Sodium hypochlorite (NaOCl) in the form of laundry bleach is available in most households. The concentrate is about 5.25 to 6 percent NaOCl, and the pH value is about 12. Sodium hypochlorite is stable for many months at this high alkaline pH value.
Chlorine gas can be recognized by its pungent, irritating odor, which is like the odor of bleach. Chlorine itself is not flammable, but it can react explosively or form explosive compounds with other chemicals such as turpentine and ammonia.
Acid-Base Balance and Blood pH. Acidity and alkalinity are expressed on the pH scale, which ranges from 0 (strongly acidic) to 14 (strongly basic, or alkaline). A pH of 7.0, in the middle of this scale, is neutral. Blood is normally slightly basic, alkaline, with a pH range of 7.35 to 7.45.
Actually, milk has a pH of around 6.5 to 6.7, which makes it slightly acidic. Some sources cite milk as being neutral since it is so close to the neutral pH of 7.0. Milk contains lactic acid, which is a hydrogen donor or proton donor.
Cherry Coke was found to be the next most acidic (pH of 2.522), and Coke was the third most acidic soda tested (pH of 2.525). Battery acid has a pH of 1.0. Pure water at room temperature has a pH of 7.0. The results show that a soda's acidity is not the whole story when it comes to tooth erosion.
The over-the-counter whitening products had a mean pH of 8.22 (range 5.09 to 11.13), and the whitening toothpastes had a mean pH of 6.83 (range 4.22 to 8.35). The 3 in-office bleaching products had a pH between 3.67 and 6.53.
It will turn greenish yellow. Therefore, if the solution is greenish yellow we know it is a base. Ask students to predict whether they think each of the household substances (bleach, ammonia, milk of magnesia (antacid), lemon juice, Coke, Drain-O, baking soda, and vinegar) is acid basic or neutral.
The pH scale
|Increasing pH (Decreasing Acidity)||Substances|
|0 (most acidic)||Hydrochloric acid (HCl)|
|3||Cola, beer, vinegar|
What does it mean for a solution to be acidic or basic (alkaline)?
|pH Value||H+ Concentration Relative to Pure Water||Example|
|8||0.1||sea water, eggs|
It is actually the salt of a strong alkali and a weak acid, so that it acts as a weak alkali. The strong alkali is sodium hydroxide (lye), and the weak acid is carbonic acid (soda water). But the sodium carbonate used is not generally made using lye and soda water.
Household bleach (sodium hydroxide) is not, technically speaking, considered corrosive or toxic, even if ingested. However, bleach exposure can cause irritation in the eyes, mouth, lungs and on skin. Individuals with asthma or other breathing problems are particularly susceptible.
Examples of oxidizers include organic peroxides, such as benzoyl peroxide, and other types of oxidizers, such as concentrated nitric acid, sodium hypochlorite (also known as bleach), oxygen, concentrated or heated perchloric acid, concentrated sulfuric acid, and concentrated hydrogen peroxide.
This is probably the dominant cause of acidity. Citric acid is another common component. Of course, the carbon dioxide is also acidic, but weakly, so there should be very little difference between carbonated and flat. Flat coke is less acidic than carbonated coke.
Mix your neutralizer. If you are using vinegar to neutralize peroxide bleach, mix one part vinegar to two parts water. To neutralize oxalic acid, mix two tablespoons of baking soda with a half pint of hot water. Apply your neutralizing agent.
Water acts as an acid (donates H+) when it reacts with a stronger base, say sodium hydroxide. Water acts as a base (accepts H+) when it reacts with a stronger acid, say hydrochloric acid. If the medium is water, water, having a pH of 7, is considered neutral.
Sodium bicarbonate is a weak base which is commonly known as baking soda and used in cooking. It weakly ionizes in water: In reaction with an acid, it liberates carbon dioxide gas: This reaction is an important part of the leavening which takes place in baking.
Pure water is neutral. If a solution has a pH that is lower than 7, that solution is considered acidic. Acids are usually sour or bitter – coffee, cola, and lemon juice all have an acidic pH. When used in cleaning products, acids help to break down difficult stains like rust or mineral deposits.
To be accurate, coffee cannot be considered an acid or a base per se, since coffee is ultimately a complex mixture of compounds. Coffee (i.e. brewed coffee) is acidic, largely due to the presence of chlorogenic acid.
An Arrhenius acid is therefore any substance that ionizes when it dissolves in water to give the H+, or hydrogen, ion. An Arrhenius base is any substance that gives the OH-, or hydroxide, ion when it dissolves in water. Acids provide the H+ ion; bases provide the OH- ion; and these ions combine to form water.
If anything a detergent or soap is more of an alkali or base. they are not acidic, although weak acids such as vinegar are sometimes used for cleaning alkaline dirt on glass say. A soap is a base , it is usually made up of sodium hydroxide or potassium hydroxide which are strong alkalis ( or base).
One common cause of acid reflux disease is a stomach abnormality called a hiatal hernia. This occurs when the upper part of the stomach and LES move above the diaphragm, a muscle that separates your stomach from your chest. Normally, the diaphragm helps keep acid in our stomach.