At what wavelengths do Cr(III) ions absorb the maximum amounts of light?
Look at your color wheel. What color is Cr(III)? It will absorb the complement of its color. You may have a graph of absorbance vs wavelength for Cr(III). If so, the maximum absorbance (in th visible region) is the wavelength you seek. It may have more than one peak but the one you want is the one in the visible.
But I don't have a graph of absorbance vs. wavelength for Cr(III), only for percent transmittance vs. wavelength for Cr(III). And I don't have a color wheel containing Cr(III). Please help me!
I need help balancing chemical equasions. For some reason I just cant do it.
Sure! Balancing chemical equations can be tricky at times. Here's a step-by-step guide to help you balance chemical equations:
1. Write down the unbalanced equation: Start by writing down the chemical equation you want to balance. For example, let's balance the equation for the combustion of methane: CH4 + O2 -> CO2 + H2O.
2. Count the number of atoms on both sides: Count the number of atoms of each element on the left side (reactants) and right side (products) of the equation. This will help you identify which elements need to be balanced.
3. Balance elements one at a time: Begin with the most complex molecule or element. In this case, let's start with carbon (C).
4. Balance carbon (C) atoms: Look at the equation and count the number of carbon atoms on both sides. In our example, there is one carbon atom on the left (CH4) and one on the right (CO2). Since they are already balanced, we move on to the next element.
5. Balance hydrogen (H) atoms: Next, count the number of hydrogen atoms on each side of the equation. In our example, there are four hydrogen atoms on the left (CH4) and two on the right (H2O). To balance the hydrogen atoms, multiply the water molecule (H2O) by 2: CH4 + O2 -> CO2 + 2H2O.
6. Balance oxygen (O) atoms: Now, count the number of oxygen atoms on each side of the equation. In our example, there are two oxygen atoms on the left (O2) and four on the right (CO2 + 2H2O). To balance the oxygen atoms, multiply the oxygen molecule (O2) by 2: CH4 + 2O2 -> CO2 + 2H2O.
7. Check and revise: Finally, check to make sure all elements are balanced. In our example, we have one carbon atom, four hydrogen atoms, and four oxygen atoms on both sides of the equation. The balanced equation is now: CH4 + 2O2 -> CO2 + 2H2O.
Remember, practice makes perfect! Balancing equations may require trial and error, and it's important to double-check your work.