Thursday
November 27, 2014

Posts by atriletz


Total # Posts: 5

Chem
Final question.. An alloy used in aircraft construction consists of aluminium, copper and magnesium. An 11.34g sample of alloy was treated with alkali to dissolve the aluminium, leaving a residue of mass 2.73g. This residue was treated with dilute hydrochloric acid solution to...
January 27, 2007

Chem
Calculate the concentration in mol per litre of ammonium ions in a solution solution prepared by mixing 360.0mL of 0.250 mol per litre ammonium sulphate solution with 675.0mL of 1.20mol per litre ammonium nitrate solution. Assume solution volumes are additive. I got 0.870 mol ...
January 27, 2007

Chem (ques 2)
The analysis of some household cloudy ammonia cleaner involved diluting a 50.0mL sample of the cleaner to a volume of 250.0mL then titrating this diluted solution. The diluted sample was found to have an NH3 (aq) concentration of 0.350 mole per L. What is the percentage by ...
January 27, 2007

Chem (edited)
The electrolyte from a car battery has H2S04 (aq) concentration of 4.5 per mol per litre and a density of 1.18g per ml What is the percentage by mass of H2S04 in the electrolyte? do you mean 4.5 mol per liter? This has absolutely no meaning: concentration of 4.5 per mol per litre
January 27, 2007

chem, grade 12
I'm having a hard time with this... ...I need help. I want to learn... Question 1) The electrolyte from a car battery has H2S04 (aq) concentration of 4.5 per mol and a density of 1.18g per mol. What is the percentage by mass of H2S04 in the electrolyte? ..I have abt four ...
January 27, 2007

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