Total Organic Compound
total organic compound
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VOCs are a major contributor to low-level atmospheric pollution and the use of these compounds leads to global warming. In addition, the use of solvent-based paints is a major cause of Sick Building Syndrome, Danish Painter’s Syndrome, Asthma, Allergies, Chemical Sensitivities and the general Flu-like symptoms reported by many people using conventional paints INCLUDING Matt and Silk wall paints! Most paints currently on sale, both gloss and emulsion, contain solvents and VOCs. Organic paints contain none. As a result they are ideal for children’s bedrooms, nurseries, kitchens and anywhere in the home, especially if you or a member of your family is chemically sensitive or suffers from asthma or allergies. Using Organic paints means that rooms are safe and pleasant to live in-play in-sleep in-eat in! What is Organic Paints?
- Water, natural plus manufactured binders (all water-based, all non-toxic)
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What is NOT Organic Paints?
- Solvents and white spirit, turpentine, terpenes, ethereal oils, VOC’S glycols, coalescents,
- Animal products
- Heavy metals, – lead, cadmium, mercury etc Ecos is EN71 compliant
- Formaldehyde and formaldehyde donors, acrolein
- Vinyl chloride
- Phthalates
- APEOs.
- Acrylic Softeners
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Article By Simply Kitchen News
Colligative Properties!?
An unknown organic compound is mixed with 0.5190g of naphthalene crystals to give a mixture having a total mass of 0.5959g. The mixture if heated until the naphthalene melts and the unknown substance dissolves. Upon cooling, the solution freezes at a temperature of 74.8 degrees celcius. What is the molar mass of the unknown compound?
naphthalene crystals f.p constant is -6.94 and b.p is 5.80
I keep getting a negative for this problem which isnt possible so how would you solve it. i did it by first finding the mass of the unknown, then the molality..using the freezing point formula, then i found the mol of the solute, which led me to find the molar mass..
but i get a negative number so thats obviously wrong.
the boling point of naphthalene is 217.7 degrees celcius
it could be due to the data you are using
the melting point of naphthalene 80.26 °C
so the delta T to put in the formula is 5.46 °C (80.26-74.8)
ΔTf = Kbp · m *i
where m is the molatity of the solution
i is the number of particles in this case = 1
5.46 = 6.94 *m
m= 0.787 mole of organic compound in 1 kg of napthtalene
= .787 * .5959 /1000 moles in .5959 g solvent = .469 * 10 ^-3 moles
these moles are .0769 g of compound ( 0.5959 – .5190g) so molecular weight = .0769 / .469 * 10 ^-3
= 164 g/ mole
don’t worry about the sign of the temp difference
and the boiling point is totally irrelevant
Clean fresh Organic from Inert material
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