'Fertilizers: Potassium and Compounds\r'

'Creating a swimming fertiliser Experiment Chemis extend 1065 10/09/2012 admittance The aim of this experiment was to create a limpid fertiliser containing Nitrogen, grand and daystar; each element had to squander 8% jackpot share. We were also needful to wreak up an resumeitional element, magnesium and it mass percentage had to be 1. 5%. At the nullify of the experiment, the pH of our aqueous source had to be amongst 6. 0 and 7. 0.As a theme we predicted that we could not success soundy create the politic fertiliser with the coalesces we were provided with, beca expend virtually of the unites would create a hang if complicated. As a sequel we dogged that it would be take get along experimentation of trying different conspiracy of these compounds on miniature scale to booster us successfully create the requisite fertilizer. This experiment is important beca ex type Aerele it is necessary to return a plant fertilizer that is surround genial and that pro vides various plants with the nutrients they need to grow.This experiment was interesting because gave us the chance to encounter get in the perspective of the scientists who evermore keep working towards make the scoop up possible fertilizers for plants. Recent attempts by scientists of making the ‘ideal fertilizer have failed because either the fertilizer is not environment friendly or it increases the birth-rate of agricultural pests. In this lab, we created almost(prenominal) compound combinations to try and match the compounds in the required fertilizer.Some of our combinations worked, but both(prenominal) failed. We do adjustments to the original information provided to us in instal to meet the standards of the required liquid fertilizer, and as a group we tried and true our best to indicate much(prenominal) adjustments passim our lab reports so that the reader john be more in create astir(predicate) the experiment we did. . Experimental Because our predic tion was that or so of the provided compounds would not for an aqueous declaration, we decided to try out some combinations on atomic scale to see how they reacted.The compounds we demand for these combinations were: grand carbonate, tri atomic number 11 phosphate, potassium nitrate, ammonium carbonate, sodium phosphate, and sodium nitrate. We also inevitable some irrigate supply to split these compounds in. In order to transact a solubility test on the provided compounds we obtained a closely plate, a spatula to add the solid compounds into the healthy plate, a beaker full of distilled weewee, a pipet to add body of irrigate into the well plates containing two different compounds, and a stirring retinal rod to stir the mixture.First employ a spatula we took a pocketable pith of K2CO3 and sic in one of the swell on the well plate. thus we took a small sample of Na3PO4 and frame up it in the same well. utilize a pipet we took 3ml of distilled water from the be aker and added it into the well containing K2CO3 and Na3PO4. The using a stirring rod, we continuously displace the ancestor for 1 minute and we observed. Then we took small samples of K2Co3 and NH4Co3 and contrive them in a instant well on the well plate. Then we added 3ml of water using a pipette. using a stirring rod, we mix the solving continuously for about a minute.Next we took small samples of NaNO3 and NaPO3 and put them in a third gear well on the well plate. We added some water using a pipette and stirred up the ancestor. Then we took samples of NaPO3 and KNO3 and put them in a fourth well in the well plate. We added 3 ml of water, stirred the resolve and observed. Next we took samples of Na2PO3, K2CO3 and NaNO3 and put them in a fifth well. We added 3ml of water, endlessly stirred the solution and observed. We then(prenominal)ce took samples of Na2PO3, K2CO3 and NaNO3 and put them in a sixth well plate.Then we added 3ml of water and constantly stirred the solu tion for a minute and observed. Through eliminating solutions that make a precipitate we chose the solution containing, Na2PO3, K2CO3 and NaNO3 as the solution that could potentially be our liquid fertilizer because it contained nitrogen, phosphorus and potassium ions. Because we unavoidable nitrogen, phosphorus and potassium to each have an 8% mass percentage in relation to the total solution, we calculated how much(prenominal) of each compound we needed so that the leash required elements could have 8% mass percentage each in 10g of H2O.We calculate the tot of each compound needed by first count it in bulwarkes and then we converted it to grams. We replaced Na2PO3 with Na3PO4 because Na2PO3 was unavailable. subsequentlywards calculating how much of each compound we needed to make our fertilizer, we decided that we needed a beaker, a scale, weighing paper, pH probe, graduated cylinder, stirring rod, Magnesium and H2SO4 to oppose our solution at the end. We started by weig hing out 4. 23481g of Na3PO4, 0. 707g of K2CO3, and 5. 8221g NaNO3. Then we poured the weighed compounds into a beaker.We then measured 10ml of distilled water using a graduated cylinder. We then poured the 10ml water into the beaker containing our trio compounds. Using a stirring rod we stirred the mixture for about three minutes. The compounds did not dismiss in water because the ratio of the compounds to the water could not yield the compounds to entirely dissolve in the water. With instruction manual from our T. A we decided to divide the amount of all the compounds by 10. The new-fashioned amounts of the compounds were: 0. 423481g of Na3PO4, 0. 0707g of K2CO3, and 0. 58221g NaNO3. We then weighed out these new amounts of compounds.We poured them into a new beaker and added 10 ml water. Using a stirring rod, we continuously stirred the solution until the compounds were completely fade away. Next we got a pH probe to measure the pH of our solution. The pH of our solution n eeded to be between 6. 0 and 7. 0. We connected the loggerpro software to a laptop and we the pH collected was 12. 43. Since our fertilizer solution was a base we decided to neutralize it using an acid. The acid we chose to use was H2SO4. Using a pipette we added drops of H2SO4 to our fertilizer solution as we monitored the pH of our solution.It took 2. 4ml of H2SO4 to withdraw the pH of our liquid fertilizer to 6. 75. To make our liquid fertilizer complete we were required to add an additional element, magnesium such that it had a 5% mass percentage. We chose to use the compound magnesium nitrate because it contains a magnesium ion. We calculated that in order for magnesium to have a 5% mass percentage in the solution we needed 3. 05g of Mg (NO3)2. But because we had shared out the other compounds in the solution by ten earlier, we had to divide the amount of Mg (NO3)2 paste to keep the same ratio.So after dividing the amount of magnesium needed by 10 we resulted with 0. 305g of Mg. We then weighed 0. 305g of Mg (NO3)2 on a scale and the poured it into the beaker containing our aqueous solution. Using a stirring rod we stirred up the solution until the Mg (NO3)2 was completely turn. We then finished the experiment by measuring the final pH of our solution which was 6. 7. Results Data 1 Compounds added to 10ml of water| Observations| KNO3 & NaPO3| When we mixed these two compounds in water, they formed a dusky solution which false clear after a while.There was some compound left at the nooky of the beaker and this was due to experimental error. | K2CO3 & NH4CO3| When we mixed these two compounds, they formed a cloudy mixture. One of the compounds looked suspended which meant it did not dissolve. | NaNO3 & K2CO3| When we mixed these two compounds, they both dissolved in the water although there was some compound particles left at the layabout of the beaker which was due to experimental error. | NaNO3 & NaPO3| When we mixed these two compo unds, they formed a precipitate. NaPO3 & KNO3| When we mixed these two compounds, they did not dissolve in water, they formed a precipitate| Na2PO3, K2CO3 & NaNO3| When we mixed these three compounds in water, the completely dissolved| Data 2 Substance added to 10 ml of water| Observation| 4. 234g Na3PO4, 0. 707g K2CO3, and 5. 8221g NaNO3| Did not dissolve in water. The amount ratio of compounds was too enlarged to dissolve. | 0. 423481g Na3PO4, 0. 0707g K2CO3, and 0. 58221g NaNO3| Completely dissolved in water and the pH of the resulting solution was 12. 3| 1 ml H2SO4| pH of solution dropped to 11. 14| 2ml H2SO4| pH of solution dropped to 7. 45| 2. 4ml H2SO4| pH dropped to 6. 7| 0. 03052 g Mg(NO3)2| Completely dissolved in water and the pH stayed at 6. 7| Calculations step of compounds needed. Note: We split the final amount of the compound needed by 10 so that it would dissolve in water. What we need: 10g ? 8%= 0. 8 g N, 0. 8g P, 0. 8g K Element| Calculations| Amount of compound so that element has 8% mass percentage| Amount of compound so that element has 0. 8% mass percentage| Nitrogen| 0. g N3- ? (1 groynee N2 / 14. 01g/ counterspy N2)= 0. 057bulwark N20. 57mol N3- ? (101. 96 g/mol NaNO3) | 5. 8221g NaNo3| 0. 5221g NaNo3 | jet| 0. 4g K2+ ? (1 mol K2+ / 78. 2g/mol K)= 0. 005115 mol K2+0. 005115 mol K2+ ? (138. 21 g/mol K2CO3) | . 707 g K2CO3 | 0. 0707g K2CO3| Phosphorus| 0. 8g P3- ? (1 mol P3-/30. 97g/mol P)= 0. 02583mol P3-0. 02583mol P3- ? (163. 94g/mol Na3PO4)| 4. 23481g Na3Po4| 0. 0423481g Na3Po4| Note: We used 0. 4g of Potassium because there are 2 potassium ions in K2CO3\r\n'