Finding Online Handbook for Reactants Properties

  • Thread starter Thread starter asfd
  • Start date Start date
Click For Summary

Discussion Overview

The discussion centers around finding reliable online resources for the properties of various chemical reactants, specifically focusing on boiling points, molar weights, melting points, solubility in water and ethanol, and densities. Participants share information and resources related to Dichloromethane, MgSO4, Caffeine, water, and NaOH, as well as methods for locating this data.

Discussion Character

  • Homework-related
  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant requests specific properties of reactants for a lab report, including boiling point, molar weight, melting point, solubility, and density.
  • Another participant provides detailed properties for Dichloromethane, MgSO4, water, and NaOH, including molar weights and solubility information.
  • A suggestion is made to use MSDS (Material Safety Data Sheet) as a reliable source for chemical properties.
  • One participant expresses confusion regarding the solubility of water in ethanol, noting conflicting information from different sources.
  • Another participant mentions that data in MSDS is typically provided at 0°C and 1 atm pressure.
  • A link to ChemFinder is shared as a potential resource for chemical information.
  • A participant recommends the Combined Chemical Dictionary as a reliable source if library access is available.

Areas of Agreement / Disagreement

Participants generally agree on the utility of MSDS as a source of information, but there is some confusion regarding the solubility of water in ethanol and the conditions under which data is reported. The discussion does not reach a consensus on the solubility issue.

Contextual Notes

Some properties provided may depend on specific conditions such as temperature and pressure, and there are discrepancies in solubility information that remain unresolved.

asfd
Messages
24
Reaction score
0
I have a lab report due tomorrow morning and I need to put some infos about the reactants (is this the correct english word?) we used. More precisely, I need to know their boiling point, molar weight, melting point, solubility in water (and ethanol if possible), density of liquids. The reactants I am talking about are Dichloromethane, [tex]MgSO_4[/tex], Caffeine( [tex]C_{8}H_{10}N_{4}O_{2}[/tex] ), water and NaOH. If somebody could post a link (on a good website) where I could find those informations or just write them from a handbook with the reference it would be very cool. For now I found all the info I need about the caffeine on http://en.wikipedia.org/wiki/Caffeine and http://www.angelo.edu/faculty/kboudrea/molecules/caffeine/caffeine.htm but I can't find the properties of other reactants.

Thanks
 
Last edited by a moderator:
Chemistry news on Phys.org
Dichloromethane

Molar Weight : 85 g/mol
Appearance: colourless liquid
Melting point: -97 C
Boiling point: 40 C
Water solubility: slight

MgSO4

Appearance: colourless odourless crystals or white powder
Molar Weight: 120.36 g/mol
Solubility: Very soluble in water. Not in ethanol.
Melting Point: 1124C (2055F)
Boiling Point: Not applicable.

Water

MP : 0 C
BP : 100 C
Molar Weight : 18 g/mol
Solubility : Immiscible with ethanol

NaOH

Appearance: White, deliquescent pellets or flakes.
Molar Weight: 40.00 g/mol
Boiling Point: 1390C (2534F)
Melting Point: 318C (604F)
Solubility: 111 g/100 g of water.
 
Usually Googling with "sodium hydroxide msds" or "dichloromethane msds", etc works pretty well.
MSDS stands for materials safety data sheet.
 
Thanks for the tip! Paper handbook are so outdated...
 
I found that : "Water Solubility is infinite in alcohols (ethanol, methanol), but negligible in gasoline." here: http://www.greenfuels.org/ethanolterms.html
But you wrote it's imiscible in water so I'm a little confused...

I also guess the infos in the MSDS are taken at 0°C ?
 
Last edited by a moderator:
Hello,

I think MSDS is the most reliable information after scientific ones. If you have a library connection, please refer to Combined Chemical Dictionary, a.k.a. ChemNetBase. The information you'll find there will be the best ones.

Regards,
chem_tr
 
asfd said:
I found that : "Water Solubility is infinite in alcohols (ethanol, methanol), but negligible in gasoline."

Oopps ! Yes, I meant "miscible".

Unless otherwise stated, data provided are taken at 0 deg C and 1 atm pressure.
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
13K
Replies
10
Views
13K
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
4K
Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 4 ·
Replies
4
Views
4K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 2 ·
Replies
2
Views
4K