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16 Cards in this Set
- Front
- Back
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What is a spectrophotometer?
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An instrument used to measure the interaction of matter with light.
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What is the equation for the transmittance?
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T=transmittance of sample/transmittance of reference bank
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What is the equation for percent transmittance?
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%T=transmittance of sample/transmittance of reference bank X 100
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What is transmittance?
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The amount of light that passes through a sample.
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How does transmittance effect what color and substance is?
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The solution color that you see comes from
the wavelengths of light with high %T. |
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What is the equation for absorbance?
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Absorbance = A = -log T
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How do you calculate the energy/photon (in J)?
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E = hc/λ, where h is Planck’s constant (h = 6.626 x10^-34 Jxs), c is the speed of light (c = 3.00 x 10^8 m/s) and λ is the wavelength in meters.
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What three solids were used in the acid rain experiment?
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NaHCO3,NaNO2,and NaHSO3
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What three gases wered used in the acid rain experiment?
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CO2,NO2,and SO2
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What four acids that occur in acid rain were generated through the acid rain experiment?
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Carbonic acid, H2CO3
Nitrous acid, HNO2 Nitric acid, HN03 Sulfurous acid, H2SO3 |
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In the acid rain experiment which gas caused the smallest drop in pH?
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Carbon Dioxide, CO2
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In the acid rain experiment which gas caused the largest drop in pH?
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Sulfur dioxide
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For the limiting reactant lab what were the reactants?
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nickel(II) chloride
hexahydrate NiCl2 6H2O(aq) and ethylenediamine (H2NCH2CH2NH2, abbreviated “en”) |
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All electromagnetic radiation travels at what speed?
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At the speed of light (3.0x10^8 m/s)
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What type of relationship exists between energy and wavelength?
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The larger the wavelength the less energy there is.
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What is Beer's law and what does each variable represent?
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A=Ec; A=absorbance,E=a constant of a solution at a particular wavelength, but E is not energy,c=concentration.
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