Search results

Ethylene and ethane are two different compounds. Ethylene and ethene are the same compound. Air is composed of ~20% oxygen which is a strong oxidising agent. The compounds in crude oil are made up almost exclusively of carbon-carbon and carbon-hydrogen bonds which should scream "highly reduced"...

Edward Jenner - Pioneer of the smallpox vaccine. Inoculated a few people with cowpox and then proved they were immune to smallpox. Louis Pasteur - Disproved spontaneous generation, discovered anaerobiosis, proposed the use of antiseptics, invented Pasteurisation. Antonie van Leeuwenhoek -...

Alexander Fleming, Howard Florey, Ernst Chain - Discovery of penicillin. Received the 1945 Nobel Prize for Physiology or Medicine. Fleming also discovered the enzyme lysozyme found in tears, saliva, mucous and milk. Hans Krebs - Discovery of the Krebs cycle. Received the 1953 Nobel Prize for...

If you did use a pH probe the equivalence points will be at ~8.3 and ~3.7 And if you wanted to run the titration the other way you would get First Step HCl + Na2CO3 --> NaCl + NaHCO3 Methyl Orange (orange --> yellow) Second Step HCl + NaHCO3 --> NaCl + CO2 + H2O Phenolphthalein (colourless...

First Step Na2CO3 + HCl --> NaCl + NaHCO3 Phenolphthalein (pink --> colourless) Second Step NaHCO3 + HCl --> NaCl + CO2 + H2O Methyl Orange (yellow --> orange) Add the methyl orange after the solution has turned colourless. --- This is why pH titrations are super brilliant.

CH3COOH + NaOH --> CH3COONa + H2O NaOH C = 0.1 mol.L-1 V = 0.023 L n = 2.3*10-3 mol Vinegar n = 2.3*10-3 mol V = 0.025 L C = 0.092 mol.L-1 C1V1 = C2V2 0.092 * 0.25 = C * 0.010 C = 2.3 mol.L-1 ---OR--- D = 0.25 / 0.01 D = 25 D is the dilution factor. (0.01 L was diluted 25 fold to give 0.25...

Assume that the solutions have the same density and specific heat capacity of water and that no heat is lost to the beaker and surroundings. NaOH V = 0.025 L m = 25 g T = 296.35 K HCl V = 0.050 L m = 50 g T = 296.35 K NaOH + HCl V = 0.075 L m = 75 g T = 297.25 K ΔT = 0.9 K q = C x m x ΔT q...

2 KI + Pb(NO3)2 --> 2 KNO3 + PbI2 PbI2 m = 2.0 g F = 461.009 g.mol-1 n = 4.3383*10-3 mol Pb(NO3)2 n = 4.3383*10-3 mol C = 0.20 mol.L-1 V = 0.0217 L

I calculated again using some different tables and got 666.4094 g.mol-1 666.4274 g.mol-1 666.4277 g.mol-1 666.4280 g.mol-1 So, m = n * F m = 1.5 mol * 666.4277 g^.mol^-1 m = 999.6416 g The maths was correct but the table was wrong. So clearly the online periodic table is a...

Yes

Looking at the ring there will be a number of carbon atoms and a single oxygen atom. The carbon atoms attached to the oxygen atom are the ones of interest. One of the carbon atoms will not have any other oxygen atoms bonded to it. The other carbon atom will have a hydroxyl group bonded it. The...

Because it keeps the position number and functional group together so when there are multiple functional groups it is easier to determine the structure.

For the rough titration you should add the titrant in 1 mL additions so for the proper titrations you can quickly run down to within 5 mL.

The strong acid form of a sulfate salt is sulfuric acid. The weak base form is zinc hydrogen sulfate/copper hydrogen sulfate. The strong base form of a magnesium salt is magnesium hydroxide. The weak acid form is magnesium hydrogen sulfate.

Do you mean lime the citrus fruit or lime the crushed rock. Based on your wording you mean the fruit which has a pH less than 2.

HSC Exam Papers - Board of Studies NSW http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2008exams/pdf_doc/2008HSC-chemistry.pdf http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/chemistry_07.pdf...

Atoms only influence other atoms if they are within 3 bond lengths away. Methanol - the C1-O bond is polar so the molecule is completely misible in water Ethanol - the C1-O and C2-C1 bonds are polar so the molecule is completely misible in water Propan-1-ol - the C1-O, C2-C1 and C3-C2 bonds are...

You need to extract the pigment. Ground a sample with sand and acetone. Gravity filter. Run thin layer and column chromatography if possible. Dilute.

Concentration will never be divided by number of moles. Apart from that I dont understand what youre saying.