Question

Hi:

I'm trying to do a lab called " Making solutions with Alkali Halides (And Breaking Them). The Lab is by John B. Brady. The lab is about X-ray diffraction and I am suppose to answer a few questions and plot the molar composition vs d-values for KCL and NaCl mixture, as well as the d111 for each sample. I have the data but I honestly am comfused about how to stay this lab. Any ideas would be appreciated. Thank you.

ACL

Answer 1

From the information, you have given about your lab and type of questions you need to answer,

The plot of different alkali halides molar composition and their X-ray diffraction pattern where specifically you need to plot the {1,1,1} plane of x-ray.

for each of diffraction pattern for alkali halides, you will have several planes from which the diffraction occurs and the angles at which the light reflects and refracts from each of halide molecules you need to check out. Later the molar composition is important in a mixture or in a solution because the pattern and strength of your diffraction pattern will depend upon this composition. Thus at the end, they need you to plot the molar composition and d-value of x-ray for KCl and NaCl mixture solution.

Start by trying to figure out the planes of x-ray diffraction and the final concentration of the mixture of KCl and NaCl and then their moles in each case, before they were made into a solution. When in solution, how their composition changes with volume.

then check out the {1,1,1 } plane of x-ray diffraction and its values from the graph you plotted, molar composition vs d-value of mixture solution.

From the given information, this is what I deduce.

Hope you do well in the lab.