New answers tagged

-1

The most comprehensive one (so not "all" chemicals) that I've seen is the Aldrich website. By law they have to supply MSDS for everything they sell. However, they may ask for a lot number or the function may not work unless you're logged in as a customer.


5

Baking soda is sodium bicarbonate NaHCO$_3$. It is stable in air indefinitely. Baking powder is a mix of sodium bicarbonate and a powdered acid, typically an aluminum or calcium hydrogen phosphate, which, in the absence of moisture, is stable for a long time (maybe a year? maybe more). After exposure to moisture, it will release CO$_2$ and become inactivated....


1

It might help to think of the system as containing three phases: $\ce{P4(s)}$, $\ce{O2(g)}$ and $\ce{P4O10(s)}$. As long as the pressure, temperature and compositions of each phase remain constant (and P,T and chemical potentials across phases are in equilibrium i.e. equal), we can alter their extents arbitrarily without altering the condition for ...


3

Nothing would happen. The reaction would not shift to produce more product. Let's suppose you allow this reaction to equilibrate in a sealed container. Equilibrate means you've reached the equilibrium value for $p_{\text{O}_2}$ at that temperature. Now further suppose you were able to remove all the product without changing the free volume (say you ...


3

I am using a saturated sodium chloride solution as an example here because it is more common and easier to reproduce at home. This system is at equilibrium, with salt dissolving and crystallizing at the same rate. If you take away the solid NaCl from a saturated solution, both the forward and the reverse reactions stop. Obviously, salt crystals are no longer ...


1

Depends on how accurately performed is each measurement. One would have to take into account precision of ruler and asymmetry of cube, for example, in the first case, and adhesion of water to cube and cylinder, causing meniscus and other errors. However, in some cases, ruler measurement would be far more accurate than water displacement: Archimedes would ...


3

Let's compare the two compounds. Solubility: Both compounds are miscible with water, so there is no difference. With the straight chain, 1-propanol may be slightly more lipophilic, and thus better able to act as a surfactant. However, 1-propanol is a really poor surfactant. Volatility: Isopropanol has a lower boiling point (82.5 degrees C) than 1-propanol (...


5

Chalk cannot at given conditions explode chemically, spontaneously turning into other compounds. It could locally "explode" mechanically as consequence of mechanical stress caused by thermal dilation due changes to temperature. But calling it explosion would be very much exaggerated. It would be rather just cracking. There is a way such cracking ...


0

Tea is may be considered as aqueous solution of many different substances extracted from solid tea leaves. (It is not so much about «tea» as in tea, or a tisane.) In this solution may be ingredients altering the surface tension of water sufficiently enough that air bubbles are trapped for a prolonged time. It could be a component added to act as a ...


1

Gypsum is the major constituent of plaster. It is non-toxic. Our lungs are capable of filtering out particles greater than 50 micrometers in diameter. Any dust finer than that is potentially dangerous.


-5

While not likely easily created, other products with air, $\ce{CO2}$ and water, in the presence of an electrical source, are conceivable in my opinion. For example, there is some discussion around NAIs per this government source to quote: One of the examples is the negative ion generator using an ultraviolet source to irradiate electrically conductive ...


5

Unfortunately this is not feasible Current catalytic converters are designed to remove noxious pollutants from exhausts. Things like carbon monoxide (poisonous) and nitrogen oxides (noxious and irritating). The trouble with doing this for carbon dioxide is fundamental. Carbon dioxide and water are the ultimate products of combustion of hydrocarbons because ...


Top 50 recent answers are included