Barium

In this experiment, qualitative analysis was used to identify two cations. Lead was identified in Part A, barium was identified in Part B and different flame colors were observed with various metal chloride solutions in Part C. Formula unit, total ionic, and net ionic equations were written for the confirmation reactions for both lead and barium. If this experiment was repeated, barium could be confirmed by the yellow precipitate BaCrO4 after confirming that the solution was clear and any…

the side form Part A was identified to contain either calcium or barium. Part C explored a different method through the use of cation flame tests to observe colored flames from six metal chloride solutions. In Part A, the initial step was to add HCl to the unknown sample. This was necessary because hydrochloric acid helped separate the cations, which is what was needed in order to distinguish the lead or silver from the calcium or barium. It did this because the chlorine ion of HCl was able to…

Summary The goal of the experiment was to determine weight % of sulfate inside an unknown sample compose of Na2SO4. The sample was dried, weighed and dissolved in water and hydrochloric acid. Barium chloride was then added in excess to drive the precipitation process to completion. Heat was use to digest the precipitate before it was filtered through an ashless filter paper and ignited to constant weight. From mass of the sample and mass of the precipitate, the percentage of sulfate in the…

is 233.39 amu or g/mol. Barium has an atomic mass of 137.33 amu or g/mol and there is only one atom of barium, so the atomic mass of barium in barium sulfate is 137.33 amu or g/mol. Sulfur has an atomic mass of 32.06 amu or g/mol and there is only one atom of sulfur so the atomic mass of sulfur in barium sulfate is 32.06 amu or g/mol. Oxygen has an atomic mass of 16.00 amu or g/mol and there are four atoms of oxygen in barium sulfate, so the atomic mass of oxygen in barium sulfate is 64.00 amu…

This was my first day of clinical and I was pretty scared. However, I'm glad that I got chosen to be in the X-Ray department. Compared to other peers in our class, I would say I got the best experience. I got to shadow a student named Shannon who was also shadowing X-ray Technicians as well. She is now in a 2-year program where she does clinical rotations at Peconic, Brentwood, and Manningville Hospitals from 8-4 through Mon-Fri and all summer. When I first got there we went into a X-Ray exam…

The unknown compound was composed of small, white crystals as shown in picture 1. The compound was completely odorless, which was tested by simply smelling the compound. Picture 1 (Unknown Compound): The solubility test of the unknown compound determined that the compound was soluble in water (H2O). The other known salts that were tested that were also soluble were all of the sulfates and NaCl. These were the only salts tested, because before this experiment it was determined by the flame test…

reacts with the hydrochloric acid to form zinc chloride and hydrogen gas (equation 10). For the first double replacement reaction, barium nitrate Ba(NO3)2 is combined with sodium hydroxide NaOH. During the reaction, the mixture is cloudy and white while there are small particles of precipitation in the solution of the test tube. After the reaction, the mixture of barium nitrate and sodium hydroxide remains cloudy and the precipitation is…

order to confirm its presence in the solution. In the second part of the experiment, qualitative methods were used again to determine the identity of the other cation in the original aqueous solution of the first part. The cation was to be either barium or calcium. In this part, a false positive…

of the Dallas Police Department subjected him to a paraffin test, where warm paraffin wax was applied to Oswald’s hands and right cheek and was allowed to cool as it extracted contaminants from his pores. If Oswald had been the shooter, traces of barium and antimony within his pores would have been present, however, while Oswald’s hands show high quantities of their traces, his cheek did not show any condemning…

contraindication of contrast media In the radiation they are using many tints , e.g. barium also We are using in the nuclear medicine and it’s called radiopharmaceuticals such as Carbon-11 , Chromium-51 , Fluorine-18FDG , Gallium-87 , Gallium-86 citrate , Technetium-99 , Iodine-123 and Iodine-131 . there are all these different uses pigments have benefits and harm . Firstly , we will talk about Iodine-123 is used to diagnoses the patients . It use for routine scan the time of…