Solvent - Page 5

Questions
  • Please help me with Freezing Point one last time? I am still having trouble and I only have one last try to get it correct? Where am I going wrong?
  • Mcq When zinc poweder is added to acetic acid ? A.the mixture becomes warm B.a gas is evolved C.the colour of mixture becomes yellow D.a solid settles at the bottom
  • How do dry cleaning solvents relate to solubility?
  • When you heat a hydrated substance what is driven off through the process of evaporation?
  • Does the fact that ethanol has a lower polarity than water limit what dissolves into it as a solvent?
  • What is the freezing point of a 50% by volume ethanol solution? Assume water is the solvent. (Use data from Table 12.7 in textbook -for your reference, the text is ‘Chemistry a Molecular Approach’ by Tro et al).
  • Which is the solvent and solute? A solution is prepared by mixing 5.000 g of water with 23.66 g of t-butanol (C8H10O) to give a final solution of 37.46 L.
  • How many grams of S were used? What is the freezing point of S in degrees C?
  • What is a universal solvent?
  • Which is solute and solvent?
  • What is the solvent of gold?
  • Sugar is soluble in water ,although sugar is a non-polar substance?why?!
  • When is extraction an appropriate technique for separation (e.g. is there an ideal sample size range, is there a minimum starting purity, what final purity should be expected, etc.)?
  • Is sulphurous acid a volatile or non-volatile,give reason?
  • What is the solvent in a liquid-liquid solution?
  • What is the freezing point of a solution of 25.0g of iodine in 500g of benzene?
  • Do all solutes dissolve in solvents?
  • Benzene, a solvent, has a freezing point of 5.5°C and a F of 5.12° CM. If 45.6 g of CCl4 are dissolved in 520.0 g of benzene, what will the freezing point of the solution be?
  • The equation for Electrospray ionisation (mass spectrometry) is: X (g) + H+ ---> XH+(g) yet the sample is dissolved in a volatile solvent, Why is it in Gaseous phase ???
  • How to calculate the solubility of solute in cosolvents ( water and ethanol)? Please guide me. thank you so much.