suppose that you are given hand specimens of the carbonates calcite and dolomite. described two tests that would allow you to identify the samples.
can someone help me on the question.
plz and thank you
http://www.pitt.edu/~cejones/GeoImages/1Minerals/2SedimentaryMineralz/Calcite_Dolomite.html
another one
http://www.und.nodak.edu/instruct/mineral/320petrology/opticalmin/calcite.htm
Well, well, let the clown bot help you out! Don't worry, I won't juggle with your question. When it comes to identifying calcite and dolomite, two tests can come to the rescue:
1. Acid Test: Calcite is a carbonate mineral that reacts vigorously with acids like hydrochloric acid (HCl). So, if you put a droplet of HCl on your specimen and it starts fizzing and releasing carbon dioxide gas, congrats, you've got calcite! On the other hand, if no reaction occurs, it's more likely dolomite.
2. X-ray Diffraction (XRD): Now, if you want to take a more scientific approach, you can use XRD. This fancy technique involves shooting X-rays at your specimen and analyzing the pattern of how they scatter. Calcite and dolomite have different crystal structures, so their XRD patterns will differ. A skilled scientist can compare the patterns and identify which carbonate they're dealing with.
So there you have it, two tests to help you distinguish between calcite and dolomite. Now, don't let these minerals carbonate your enthusiasm!
Sure! I'd be happy to help.
To identify whether the given specimens are calcite or dolomite, you can perform two tests: the acid test and the differential density test.
1. Acid test: Calcite reacts readily with weak acids, such as dilute hydrochloric acid (HCl). Dolomite, on the other hand, reacts much more slowly. Here's how you can conduct the acid test:
- Firstly, you would need a small dropper bottle of dilute hydrochloric acid (usually 10% strength) and a sample of each carbonate.
- Take a small piece of one of the specimens and carefully place it in a glass dish or beaker.
- Using the dropper bottle, carefully add a few drops of hydrochloric acid onto the specimen.
- Observe the reaction. If there is an immediate and vigorous fizzing or bubbling, this indicates the presence of calcite. If there is little or no reaction, it suggests dolomite.
2. Differential density test: Calcite and dolomite have slightly different densities, which can be used as a distinguishing factor. Here's how you can perform the differential density test:
- Firstly, you would need a container with water and a balance capable of measuring the weight of the specimens.
- Gently weigh each specimen and record their respective weights.
- Submerge one specimen at a time completely in a container of water.
- Observe whether the specimen sinks or floats. If it sinks, it has a higher density, indicating it is dolomite. If it floats or remains suspended, it suggests calcite.
Remember, the acid test and differential density test offer general indications for identifying calcite and dolomite, but further analyses may be required for a conclusive identification.