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Everything posted by Darkblade48

  1. Umm...no. Dissolution of ammonium chloride will not result in your stated products.
  2. If this is indeed homework, I would imagine that the original poster meant to refer to manganese dioxide...of course, I could be wrong.
  3. Really, this homework question could be easily solved by looking at an organic textbook that covers esters, or, just doing a quick search on Google.
  4. Do you have a melting point apparatus? Everything eventually melts at some point Of course, other identification methods are possible, but it all depends on the type of equipment you have access to.
  5. Ions are generally charged particles, such as a nitrate ion (NO3-). Atoms are the smallest individual particle (barring subatomic particles), such as Al, B, C, etc (various elemental atoms). Molecules would be combinations of the atoms, such as water (H2O), or carbon dioxide (CO2). Chemically, they are very different from each other; there is a vast difference between various molecules, let alone the difference between a molecule and an atom.
  6. To control the heat source, as long as the sodium acetate is in the liquid form, it will not heat up. Once the crystalization process begins, the heat that was stored will be released, causing the temperature to rise to ~ 55 C (yes, this is the limit). To reliquify the sodium acetate, one must heat it to 55C or above.
  7. I'm not sure of any gas that is 100% safe if inhaled in large quantities... Even (pure) oxygen is dangerous to breathe in. Obviously, it goes without saying that if you were to breathe in large quantities of any other gas, without the presence of oxygen, you'd die Also, overflowing may or may not be an issue, depending on the size of the container. For example, if you put in baking soda with vinegar, production of CO2 commences. Depending on the conditions, the bubbles of CO2 might froth out of the container, or it might not. Again, CO2 isn't a gas that is 100% to inhale in large quantities.
  8. I was led to believe that hydrochloric acid does not attack (pure) gold directly, and could only attack it when an oxidizer was present (hence the reason why aqua regia works)
  9. Might there be some more labelling as to whether the stuff inside was indeed iron oxide? Usually, things won't just be labelled so ambiguously (at least, they ought not to be!)
  10. Hydrogen bonding usually allows the lower carbon length alcohols to be soluble in water. Higher carbon length alcohols tend not to be soluble because of the hydrophobicity that the long carbon chain imparts onto the molecule. Also, what's with replacing the O's with 0's (o's with zeros)
  11. I thought that sublimation was from solid to gas, and that from the gaseous state to a solid state was known as deposition?
  12. Titration is the process where, by adding a known amount and known concentration of (either) a base or acid to the other. By doing this, it allows you to calculate the concentration of the unknown. For example, if you know the concentration and volume of sodium hydroxide you add to your unknown concentration (but known volume) of acid, then you can calculate the concentration of the acid. At a pH of 7, you know that there is no excess of acid or excess of base, and from there, with the amount of base added known, you can calculate the concentration of the acid.
  13. I'm not sure whether pools are normally kept on the basic side of the pH scale, so I can't say for certain whether or not addition of phenolphthalien to a swimming pool will cause it to turn pink. In addition, I would imagine you'd need quite a bit of the indicator, since a swimming pool is usually quite large in terms of volume.
  14. As I said, I was not sure what the chemical was. Unfortunately, my memory fails me at this time, and indeed, it does not seem as if CCl4 is the correct chemical.
  15. Your plumber must have been referring to copper sulfate, like you suspected. Also, copper sulfate might improve the growth of plants in small (miniscule!) amounts, as copper is an important micronutrient. However, in high(er) concentrations (i.e. what you will be putting into your toilet pipes), it will kill the (unwanted) plants.
  16. I believe carbon tetrachloride could burn at a low enough temperature that it wouldn't "harm" your hand, per se (i.e. won't be hot enough to burn your hand). Of course, you'd have to contend with the toxicity of carbon tetrachloride instead...
  17. Jeez you're right. I posted that at 7 am local time I really should stop answering chemistry questions so early in the morning
  18. I thought it was just because you are providing more sites of nucleation for the carbon dioxide?
  19. For determining covalent vs. ionic bonds, the short answer is it's up to "experience". However, the longer answer is that you should look at electronegativities between the two bound elements. For example, if the difference in electronegativity is greater than 1.7, the bond is said to be 51% ionic. You can find tables of the percentage ionic character of a single chemical bond (usually on a periodic table). Note that calcium carbonate is Ca(CO3)2 What do you mean by having an OH after an element? Perhaps like NaOH? This is a compound, known as sodium hydroxide. In water, it will dissociate to form Na+ and OH-, and as you have mentionned, the hydroxyl anion acts as a strong base.
  20. Are you saying that the 3% hydrogen peroxide you purchased did not produce any oxygen?
  21. Technically, your reaction is correct, however, the ions will combine to form calcium acetate (of course, since this is in an aqueous phase, they should be Ca+2 (aq) and CH3COO- (aq), but then again, so would be the calcium carbonate and the acetic acid )
  22. As far as I know, CH3COO does not exist as an isolatable compound. It is, however, the acetate anion...
  23. To be honest, there might exist a way, but I doubt anyone would want to attempt to do this, as the alcohols you listed are more easily obtained/purchased rather than synthesized.
  24. Indeed, I believe Neon is correct; the hydrogens attached to the methyl groups should be able to hydrogen bond with the oxygens.
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