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Is bad to inhale the fumes of ammonia?

Ammonia is a colorless highly irritating gas with a sharp suffocating odor. According to New York State Department of Health: Ammonia is corrosive. The severity of health effects depends on the route ...
Mathew Mahindaratne's user avatar
12 votes
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What is laboratory air?

Laboratory air is not a designated or special term. All it conveys to the experimentalist is that literally "laboratory" air was used for oxidation. This is perhaps a handwaving way of ...
AChem's user avatar
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1 vote

Why potassium carbonate breaks glass when heated?

If the beakers are not made of borosilicate glass, it will react with the metal carbonate and break the glassware: Fusion with an alkali metal carbonate, usually anhydrous sodium or potassium ...
Nilay Ghosh's user avatar
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5 votes
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In JJ thomson's cathode ray experiment why is the effect of gravity on the electron not considered?

Various versions of Thomson's original article (Philosophical Magazine, 44, 293-316 (1897)) can be accessed freely online, for instance at Google books, or here (link liable to rot). But you can work ...
Buck Thorn's user avatar
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Tollen's Test - Clean Up

This answer will focus on the equations involved in the reactions of the questions. For the explanation please refer anon's answer. Equations: Tollen's test of formaldehyde (works same for glucose, ...
Harikrishnan M's user avatar
3 votes
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Tollen's Test - Clean Up

This mixture, often called "chromic acid," is a common way to clean glassware. It is a strongly oxidizing acid which reacts with most organic material, so it is able to remove most types of ...
anon's user avatar
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1 vote

why are there no pictures or experiments on solid ozone?

The color of liquid ozone is documented in sciencemadness.org: Liquid diatomic oxygen, for comparison: The color difference is similar to what we see between aquo and ammine complexes of copper, and ...
Oscar Lanzi's user avatar
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2 votes

What's the practical use-cases of Raoult's Law?

I can think of one right away, that is estimating molecular masses of solutes. Further, making fractional distillation requires mole fractions in the gas phase to be different those in the solution ...
ananta's user avatar
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2 votes

Soil chemical Anaylsis/CAL-P

The first sample of soil has $6.57$mg $\ce{P2O5}$ in $100$ mg soil, or $65.7$ mg $\ce{P2O5}$ in $1$ kg soil. As $\ce{P2O5}$ contains $43.6$ % P, the soil contains $0.436 · 65.7$ mg P = $28.5$ mg P in $...
Maurice's user avatar
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1 vote

Understanding Rossini and Frandsen experiment for measuring $(\partial u/\partial P)_T$?

One form of the general virial equation of state for a real gas is $$\frac{Pv}{RT}=1+B^*(T)P+C^*(T)P^2+...$$where v is the molar volume. At low pressures, this approaches $$\frac{Pv}{RT}=1+B^*(T)P$$ ...
Chet Miller's user avatar
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1 vote

using either 2-propanol or isopropyl alcohol for writing a report

Many compounds can have more than one systematic IUPAC name. A compound may be named correctly in two or more ways in accordance with the several methods recommended by IUPAC. However, “isopropanol” ...
Loong's user avatar
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2 votes
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What does it mean if a calibration curve regression doesn't cross (0,0)

I saw a couple of reports about how forcing it was bad but I was just wondering if there was any other explanation for why my absorbance might be so high. You are doing emission spectroscopy (AES= ...
AChem's user avatar
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1 vote
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Storage of air and temperature sensitive reagents

Your question can not be easily answered. The only valid reply must be: It really depends on the individual case and the reactivity as well as physical properties. Is your compound easy to evaporate? ...
raptorlane's user avatar
-2 votes

Storage of air and temperature sensitive reagents

To store air-sensitive and temperature-sensitive reagents: Air-Sensitive Reagents: Use air-tight containers. Inert gas can help displace air. Store in a cool, dry, dark place. Temperature-Sensitive ...
Abhinav's user avatar
3 votes

Storage of air and temperature sensitive reagents

Three thoughts: As soon as you pierce the septum, it is perforated. Depending on what you aim to store in the bottle, the material of the septum and its age (not age, but what happened to the septum [...
Buttonwood's user avatar
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