Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : Ballard Power -world leader zero-emission PEM fuel cells -- Ignore unavailable to you. Want to Upgrade?

To: Dr. Ezzat G. Bakhoum who wrote (2673)	6/1/1998 11:24:00 PM
From: The Devil Dog	Read Replies (1) \| Respond to of 5827

I look forward to your comments. One quick question - Could someone post a few links of good sources to research patents. Dr. Bakhoum, could you please post the links that you will use source the patents. I'm very weak in this area of research and would like to improve my sources and abilities. Any comments or tips would be very much appreciated. Best Regards WB

To: Dr. Ezzat G. Bakhoum who wrote (2673)	6/2/1998 9:24:00 AM
From: Urlman	Respond to of 5827

The Long Boom Continued (First arcticle in Wired caused this stock to run) nytimes.com cheers, Urlman

To: Dr. Ezzat G. Bakhoum who wrote (2673)	6/2/1998 3:40:00 PM
From: Sleeperz	Read Replies (3) \| Respond to of 5827

>>>>Concerning the "glass" membrane, I still think that this is funny.<<<< Well the reason why you are unable to comprehend why a glass membrane will not work in a Fuel Cell is because the principle behind a Fuel Cell is Chemistry, while you have a PHd in Physics. Glass membrane electrodes are commonly use in chemistry to respond to Hydrogen ion concentrations. 1. The response of a glass membrane electrode to the concentration of H+ in solution is currently believed to be due to: (A) separation of phlogiston from the glass by H+ (B) polarization of the internal reference electrode by H+ (C) adsorption of H+ on the glass surface (D) ion exchange equilibrium such as Na+ (glass) + H+ (aq) <=> H+ (glass) + Na+ (aq) (E) the glass acting as a semi-permeable barrier through which only H+ can pass 2. Glass membrane electrodes can be made selective for cations other than H+ by: (A) removing H+ from the solution before the measurement. (B) buffering the solutions. (C) solving the Nernst equation in a different way. (D) using a silver-silver chloride reference electrode. (E) changing the composition of the glass, using different metal oxides in its manufacture. 5. What must the H+ concentration be in a solution that contains 0.10 M H2CO3 in order for the [CO32-]/[HCO3-] ratio to be 0.022? For H2CO3, Kl = 4.3 x 10-7 and K2 = 5.6 x 10-11. (A) 5.6 x 10-11 M (B) 2.5 x 10-9 M (C) 1.9 x 10-5 M (D) 9.5 x 10-9 M (E) 1.2 x 10-12 M 6. The titration curve below is obtained when a sample of Na2CO3 is titrated with 0.1000 M HCl. If a sample is titrated to a methyl orange end-point, which expression correctly gives the number of millimoles of Na2CO3 in the sample? [Note: there are two pieces of information missing here - the titration curve, and a list of indicators with their pKa's. These graphics were unavailable, however, I have left the question so you know what to expect.] 7. At which point on the titration curve in Question #6 is the reaction below just stoichiometrically complete? [Again, you would need the graphic to do the problem.] CO3-2 + H+ --> HCO3- (A) E (B) B (C) C (D) D (E) A 8. Which of the following is NOT a useful method of preparing hydrogen? (A) reaction of active metal with acid (B) reaction of propane with steam (C) extraction from atmospheric gases (D) water gas reaction, steam and carbon (E) electrolysis of brine 9. The molar mass of deuterium oxide (heavy water) is: (A) 21 (B) 18 (C) 19 (D) 20 (E) 17 cl