Diluted acid etches away a thin layer of the plaster removing stains, cleaning grout joints, and killing any algae spores that may be embedded into the porous plaster finish. Adjusting the pH level in your swimming pool to the range of 7.2-7.6 is easily accomplished by adding an acid if your pH is high, or adding a base if the pH is too low
The colour you get in test-tube 7 might tell you something about the quality of your deionised water! Students sometimes worry about overfilling the measuring cylinder to a level above the 10 cm3mark
Chemistry: The pH Scale
Used by arrangement with Alpha Books, a member of Penguin Group (USA) Inc.To order this book direct from the publisher, visit the Penguin USA website or call 1-800-253-6476
Descaling with hydrochloric acid - Chemical environmental control - Eng-Tips
You could use also sulfamic acid, but the pH will get to 1 so I fear for copper.Please pay attention, descaling with acid will produce CO2 that will need to be degassed from the water. When the tanks were installed this quantity of throughput wasn't foreseen (client thinking: make things in china because it's cheaper; current situation: spend ages after sorting out the lack of QC and then test and fix in the UK as it's quicker and will work...
Bill Mingarell - York, Pennsylvania (2005) I'm a newcomer here but, I was in a classroom with approximately 15 open beakers with Hydrochloric acid in them and, rest assured, it is not that noxious and choking. And if you become a finishing.com addict, you'll notice that quite a few of the responders need to have dogs or dawgs with them! If you have just a few small parts then, as the man said, go to the Hardware store and get a small bottle of Muriatic acid
Acid-Alkaline Balance, What it is, and Why is it important to good health.
Acid-alkaline balance in the body is essential since many biochemical, physiological, and enzymatic functions work best at or occur only at certain pH levels. Some researchers now believe that acidosis contributes to osteoporosis, muscle loss, insulin sensitivity problems that lead to diabetes, heart failure and other heart diseases, and acidic tissue levels during the initial formation of many types of cancer
Example: HCl (Hydrochloric acid) in water Characteristics of Acids: **Acids taste sour **Acids react strongly with metals (Zn + HCl) **Strong Acids are dangerous and can burn your skin Examples of Acids: 1. Neutralization Reactions ** When acids and bases are added to each other they react to neutralize each other if an equal number of hydrogen and hydroxide ions are present
The position of the color-change interval in the pH scale varies widely with different indicators.Thus for acid base titrations, an indicator is chosen which shows a distinct color change at a pH range very sharp and close to that of equivalent point. For example, in volumetric analysis, during the titration of sodium hydroxide with hydrochloric acid (titrant in the burette), phenolphthalein turns pink to colorless when the entire of sodium hydroxide gets neutralized by hydrochloric acid and the pH becomes neutral
CHEMTUTOR ACIDS AND BASES
You can make your own exercises and check your answers by going around the pH box and coming back to the same number and by going the other way around the pH box. (Example - sodium chloride) Salts made of the anion of a strong acid and the cation of a weak base will be acid salts, that is, the water solution with this salt will have a pH of less than seven
Calculations When calculating how much hydrochloric acid is needed to neutralize your pool water to the optimal pH range, you need to know the volume of the water in your pool. This is the most comfortable range for your eyes and skin, and provides the optimum chlorine levels to prevent bacteria, algae and fungus growth, without developing scale, the white crusty substance often seen on pool tiles, or becoming too corrosive
If you are using HCL to clean pool tiles, pour a few drops on the tile using a narrow-nozzle bottle and rub the tiles with a plastic brush to clean them. Other People Are Reading Is Muriatic Acid the Same As Hydrochloric Acid? How to Add Acid to Swimming Pools HCL Function HCL is a basic requirement of swimming pool maintenance procedure
Just as with the tile cleaners, however, it's important to follow the manufacturer's instructions when you're working with these products to ensure your own safety. It's important to observe good safety precautions when working with muriatic acid, because if you're careless or sloppy while diluting it, you can burn yourself severely
But if you are just washing an organic layer to remove traces of bases, then it does not matter as long as the mmoles of HCl are many times the mmoles of what you are extracting. Bob says that as long as the mmols of hcl are much more than the mmols of what your extracting you should be fine yet in a post by another user later on in the thread states that "to potent of hcl was added and this destroys the product"
What is the pH Scale?, explaining indicators colours, acids, alkalis (soluble bases), neutralisation to form salts gcse chemistry KS3 KS4 Science IGCSE revision notes
The diagram above gives the sort of range of colours you get from using universal indicator, which is a complex mixture of different dye molecules that respond to changes in pH. Universal indicator solution or paper, is prepared from mixing several indicators to give a variety of colours to match a wide range of pH values from very acid to very alkaline
The pH scale is logarithmic which means that moving on (unit either way on the pH scale results in a 10 fold increase in the degree of alkalinity or acidity. Use solutions of phosphoric or sulfamic acid cleaners, typically in the pH range of slightly less than 2, may be described as "safe" acids comparison to the stronger acids
What is pH? (with pictures)
by email wiseGEEK Slideshows Top 10 facts about the world These 10 animal facts will amaze you 10 most extreme places on Earth Can you see through these real-life optical illusions? You won't believe these 10 facts about people 10 hilariously insightful foreign words Top 10 unbelievable historical concurrencies These 10 facts about space will blow your mind Adorable animal families that will make you "aww" Top 10 amazing movie makeup transformations A pH (potential of Hydrogen) measurement reveals if a solution is acidic or alkaline (also base or basic). Though drinking tap water with alkalinity is not harmful, the declining quality of tap water over the years has resulted in many people opting for faucet or pitcher filters to remove chlorine, chloramines, pesticides and other substances
No comments:
Post a Comment