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Explain a wildlife biologist is interested in testing the pH of the water in a lake. He obtains a 200mL sample of the water and titrates this sample with a 0.050 M NaOH solution. Neutralization of the lake water requires 40mL of the NaOH solution.
Approximate the pH of the lake.
a) 6b) 2c) 1d) 4e) 3
Determine the calculated pH of the solution if initially there is 2.0mL of CH3COOH at an initial concentration of 0.89M and 0.80mL of 1.0M Hydrochloric Acid is combined.
Calculate the mass percent of a solution that is prepared by adding 61.3g of NaOH to 492g of H2O
Calculate the pH of a buffer solution (consisting of 30mL 1.0M NaA + 30mL 1.0M HA and a pH of 4.75) mixed with 2mL of 1.0M NaOH. (In class we got a calculated pH of 4.63 for the mixture of the buffer solution with 2mL 1.
no2nbspreacts with f2nbspto give no2nbspaccording to the following overall reaction2no2g f2g rarr 2no2fgwhat is the
If 3.17 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
Write the expressions for Kc for the following reactions. a. 2O3(g) --> 3O2(g) b. Ti(s) + 2Cl2(g) --> TiCl4(l) c. 2C2H4(g) + 2H2(g) --> 2C2H6(g) + O2(g)
predict the sign of delta s for each of the following reactionsn2h4 -gt n2 2h2oc2h5oh 3o2 -gt 2co2 3h2op4 5o2 -gt
he uses the combustion of natural gas which is exothermic to heat the water how much natural gas will he need to burn?
Calculate the pH for each of the following cases in the titration of .50 mL of .150 M hypochlorous acid, HCLO(aq)
Octane ratings are assigned to gasoline mixtures based on their ability to prevent knocking relative to isooctane. Estimate the energy released during the combustion of 1.00 mol of pure isooctane.
Calculate the reflection loss when a beam of radiant energy passes through an empty quartz cell assuming the refractive index of quartz is 1.55.
A voltaic cell with Mn/Mn2+ and Cd/Cd2+ half-cells has the following initial concentrations: [Mn2+] = 0.090M and [Cd2+] = 0.060M. What is the equilibrium concentration of Cd2+
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