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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: dlv6gc on September 24, 2010, 12:16:53 PM

Title: desperately need help due by 11:59 pm tonight
Post by: dlv6gc on September 24, 2010, 12:16:53 PM
#1) How many milliliters of 0.55 M HCl are needed to react with 5.9 g of CaCO3?
       2 HCl(aq) + CaCO3(s) --->  CaCl2(aq) + CO2(g) + H2O(l)
#2How many grams of solid barium sulfate form when 14.2 mL of 0.160 M barium chloride reacts with 64.4 mL of 0.055 M sodium sulfate? Aqueous sodium chloride is the other product.
Title: Re: desperately need help due by 11:59 pm tonight
Post by: MrTeo on September 24, 2010, 12:59:17 PM
Show us your attemps first...
Title: Re: desperately need help due by 11:59 pm tonight
Post by: JGK on September 24, 2010, 03:12:37 PM
Rules Is Rules  :D

Just because you left it till the last minute doesn't get you a free pass
Title: Re: desperately need help due by 11:59 pm tonight
Post by: dlv6gc on September 24, 2010, 10:25:06 PM
i no longer need help with problem 1 but i still need help with 2 i dont know where to start so i have no attempts to show... except Na2SO4 + BaCL ----> BaSO4 + 2NaCl 

Title: Re: desperately need help due by 11:59 pm tonight
Post by: dlv6gc on September 24, 2010, 10:27:18 PM
what do you mean left it to the last minute i have been working on my chem hwk since wednesday and i just found out about this site today and thats when i tried to get help
Title: Re: desperately need help due by 11:59 pm tonight
Post by: MrTeo on September 25, 2010, 02:41:58 AM
Quote from: dlv6gc on September 24, 2010, 10:25:06 PM
i no longer need help with problem 1 but i still need help with 2 i dont know where to start so i have no attempts to show... except Na2SO4 + BaCL ----> BaSO4 + 2NaCl 

C'mon... Lavoisier's law and limiting reagent, it's simple stoichiometry.

http://en.wikipedia.org/wiki/Limiting_reagent (http://en.wikipedia.org/wiki/Limiting_reagent)