Chemical Piranha Solution

Chemical Piranha Solution Chemical piranha solution or piranha etch is a mixture of a strong acid or base with peroxide, mainly used to remove organic residue from glass and other surfaces. Its a useful solution, but hazardous to make, use, and dispose of, so if you need to prepare this chemical, read over the precautions and disposal advice before you get started. Heres what you need to know: How To Make Piranha Solution There are multiple recipes for piranha solution. The 3:1 and 5:1 ratios are probably the most common: 3:1 concentrated sulfuric acid (H2SO4) to 30% hydrogen peroxide (aqueous H2O2) solution4:1  concentrated sulfuric acid to 30% hydrogen peroxide solution5:1  concentrated sulfuric acid to 30% hydrogen peroxide solution 7:1 concentrated sulfuric acid to 30% hydrogen peroxide solution (less common) base piranha: 3:1 ammonium hydroxide (NH4OH) to hydrogen peroxide Prepare the solution in a fume hood and be certain you are wearing gloves, a lab coat, and safety goggles. Put the visor down on the hood to minimize the risk of damage or harm.Use a Pyrex or equivalent borosilicate glass container. Do not use a plastic container, as it will react with the solution and eventually fail. Label the container before preparing the solution.Make certain the container used for mixing is clean. If there is excessive organic matter, it may cause a vigorous reaction, possibly leading to a spill, breakage, or an explosion. Slowly add the peroxide to the acid. Do not add acid to peroxide! The reaction will be exothermic, may boil, and may splash out of the container. The risk of boiling or of sufficient flammable gas being released that could lead to an explosion increases as the amount of peroxide increases. Another method used to prepare piranha solution is to pour sulfuric acid over a surface, followed by peroxide solution. After time is allowed for the reaction, the solution is rinsed away with water. Safety Tips   Make piranha solution fresh before each use because the solution decomposes.Activity of the solution is increased by heating it, but dont apply heat until after the reaction to make the solution has completed. Its advisable to let the solution cool slightly after reaction before heating it.Do not leave hot piranha solution unattended on the lab bench.Do not store piranha solution in a sealed container. For that matter, do not store chemical piranha for later use, period.In case of skin or surface contact, rinse affected area immediately with large volumes of water. Continue rinsing at least 15 minutes. Seek appropriate emergency aid.In case of inhaling, remove affected person to fresh air and seek emergency medical aid. Be aware symptoms of exposure may be delayed.In case of suspected ingestion, seek immediate medical attention. How To Use Piranha Solution To Clean Sintered Glass - Piranha solution is used to clean sintered glass or fritted glass because it doesnt damage pores in the glass (which is why you dont use a strong base instead). Soak the glassware overnight in piranha solution before rinsing it with water.To Clean Glassware - Piranha solution can remove contamination on glassware that is untouched by other chemicals. Its important there is not excessive organic contamination. Soak the glassware overnight, then thoroughly rinse it.Apply as a surface treatment to glass to make it hydrophilic. Piranha solution increases the number of silanol groups on the glass surface by hydroxylating the silicon dioxide.Apply to remove residue from surfaces. Make sure you are removing residue and not a significant layer of material! Disposal of Piranha Solution To dispose of piranha solution, allow the solution to cool completely, to allow for it to release oxygen gas. Make sure the gas has dissipated before proceeding.Neutralize piranha solution by diluting it with large amounts of water. Do not neutralize it by adding a base, as the rapid decomposition releases heat and pure oxygen gas. The exception is when the volume of piranha solution is small (~ 100 ml). Then, dilute the piranha by adding it to water until it is less than 10% of the volume. Add sodium hydroxide or sodium carbonate solution until the pH is 4 or higher. Expect heat, bubbling, and possibly foaming when the base is added to the acid solution.Usually, its okay to wash diluted piranha solution down the drain. However, some places prefer it be treated as toxic waste. Disposal also depends on the purpose of the solution, since some reactions may leave toxic residue in the container. Do not dispose of piranha solution with organic solvents, as a violent reaction and explosion will occur.

Valentines Day Quotes for the Single Person

Valentine's Day Quotes for the Single Person If you are single, then Valentines Day may not be the  best time of the year for you. In fact, some are calling it, Singles Awareness Day. Seeing other people celebrating their love can make you a little envious. Even if you have a great life and arent actively seeking a partner, its easy to start hating on the holiday and perhaps feeling sorry for yourself. However, dont be let down. Lift your sagging spirits by reading these Valentines quotes and by dreaming of your own happily-ever-after. It doesnt have to include a knight in shining armor or a princess to be rescued. Mike Primavera You are never alone on Valentines Day if youre near a lake and have bread. KushandWizdom.tumblr I am constantly torn between I dont need anyone and Hey you, please fall in love with me. Emily Heller Ive been single for a while and I have to say, its going very well. Like... Its working out. I think Im the one. Robert Burton No cord or cable can so forcibly draw, or hold so fast, as love can do with a twined thread. Alexandra Penney The ultimate test of a relationship is to disagree but to hold hands. Mignon McLaughlin No one can understand love who has not experienced infatuation. And no one can understand infatuation, no matter how many times he has experienced it. Anonymous A kiss is something you cannot give without taking and cannot take without giving. Theodor Reik The lover is a monotheist who knows that other people worship different gods but cannot himself imagine that there could be other gods. Henny Youngman A kiss is the shortest distance between two. Mae West I have found men who didnt know how to kiss. Ive always found time to teach them. Marguerite de Valois It is the same in love as in war; a fortress that parleys is half taken. Todd Ruthman It is the things in common that make relationships enjoyable, but it is the little differences that make them interesting. William Shakespeare Love looks not with the eyes, but with the mind, And therefore is winged Cupid painted blind. Aerosmith Falling in love is so hard on the knees. Anonymous True love is when you put someone on a pedestal, and they fall - but you are there to catch them. Mignon McLaughlin In the arithmetic of love, one plus one equals everything, and two minus one equals nothing. Jacques Benigne Bossuel The heart has reasons that reason does not understand. Philip Robinson And when the future hinges on the next words that are said, dont let logic interfere, believe your heart instead. Luciano de Crescenzo We are, each of us angels with only one wing; and we can only fly by embracing one another. Julius Gordon Love is not blind - it sees more, not less. But because it sees more, it is willing to see less. Aristotle Love is composed of a single soul inhabiting two bodies.