Titration to a phenolphthalein endpoint
A sodium hydroxide solution is standardized using 0.502g of solid oxalic acid, H2C2O4. Find the molarity of the base if 30.50 mL are required for the titration to a phenolphthalein endpoint.
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Two determinations of the dissolved oxygen content of a 200 mL sample of water made five days apart, gave 5.3 ppm and 2.2 ppm of dissolved O2, respectively. What is the biological oxygen demand of the sample?
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Determine the expected value of each project's annual cash flows.Determine each project's risk-adjusted net present value.
If the rate of disappearance of N2O5 is equal to 1.60 mol/min at a particular moment, what is the rate of appearance of NO2 at that moment?
A 10.0 mL sample of household ammonia solution required 33.55mL of 0.450 M HCl to reach neutralization. Calculate (a) the molar concentration of the ammonia and (b) the mass/mass percent concentration of ammonia(17.04 g/mol), given a solution dens
Konerko Company sells two types of computer chips. The sales mix is 30% (Q-Chip) and 70% (Q-Chip Plus). Q-Chip has variable costs per unit of $30 and a selling price of $50. Q-Chip Plus has variable costs per unit of $35 and a selling price of
A student titrates a sulfuric acid solution of unknown concentration with 0.15 M sodium hydroxide. The titration requires 34.8 mL of the sodium hydroxide solution to completely neutralize 10.00 mL of the sulfuric acid solution. What is the concent
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