+ 10CO2 (g) + 8H2O (l) Volume of potassium manganate (KMnO4) = 32.5 mL Mass of Sodium Oxalate (NaC2O4): 0.104 [KMnO4] Calculation: = (0.104g of NaC2O4)(1 mol NaC2O4 /134.0g)(2 mol KMnO4 / 5 mol NaC2O4)(1/32.5 mL)(1000 mL /1L) = 0.00955 M KMnO4 2. Using the standardized concentration of KMnO4 calculated above to find the mass percentage of the oxalate ion Equation: Volume of KMnO4 reacted with Oxalate ion = (Vol of KMnO4 used in titration - Vol of KMnO4 used in blank titration) Titration Trial
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The factors affecting the rates namely the catalyst‚ temperature‚ and concentration are shown in the data how effectively each function affects the result. From the data of the experiment conducted‚ the rates of reactions sped up when there was a presence of a catalyst‚ increased temperature‚ and larger surface area and concentration. With the knowledge of chemical kinetics‚ people may calculate which reactions would be most efficient for a certain scenario. RESULTS & DISCUSSION Part A: Effect
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CHAPTER II RELATED LITERATURE Blumea balsamifera(sambong) A Phytochemical and Pharmacological Review Sambong (Blumea balsamifera) is a native flowering or weed that is endemic in the Philippines and other tropical countries. It is a popular herb especially for its healing properties including antidiarrhetic‚ antigastralgic‚ expectorant‚ stomachic‚ and antispasmodic‚ among others. Aside from these‚ sambong is also popular for being emmenagogues‚ or for stimulating menstruation or the blood flow
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colloidal. However‚ heating the solution causes it to coagulate and facilitates separating the precipitate from the solution. Potassium oxalate is added to the FeC2O4 precipitate‚ which produces a slightly basic solution for the oxidation of the ferrous ion to the ferric ion‚ by hydroxide‚ H2O2. The following reaction takes place: H2O + HO2- +2Fe2+ 2Fe3+ + 3OH- The OH- ion concentration of the solution is high enough so that some of the Fe3+ reacts with OH- to form ferric hydroxide(brown precipitate) as
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CHEMICAL KINETICS RESULTS AND DISCUSSION The balanced equation of the reaction between sodium thiosulfate and Hydrochloric acid is: S2O32- (aq) + 2 H+ (aq) SO2 (g) + S (s) +H2O (l) Using beakers with the same diameter was very important in conducting the experiment. If different sizes were used‚ the visibility of the “x” on the paper beneath the beaker could disappear from view too early or too late than the hypothetical time depending on the depth of the solution. It was also significant
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1 OCTOBER 5 2013 QUALITATIVE TESTS FOR SOME CATIONS II I. Introduction Qualitative analysis schemes are often based on selective precipitation of different cations. By carefully selecting reagents and conditions for reactions‚ groups of ions can be separated on the basis of their reactivity and the solubility of their salts. This enables the experimenter to use simple techniques with standard laboratory equipment‚ as well as to learn some descriptive chemistry. Cations are Alkali and Alkaline
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SYLLABUS CHEMISTRY (043) CLASS-XII – (2012-13) Annexure - ‘ I ’ S.No. 1. 2. 3. 4. Type of Question Long Answers (LA) Short Answers-II (SA II) Short Answers-I (SA-I) Very Short Answer (VSA) Total Marks for No. of Total Marks each Question Questions 5 3 2 1 3 9 10 08 30 15 27 20 08 70 Weightage 4 5 5 5 4 3 8 5 3 4 4 6 4 4 3 3 70 Total: S.No. UNIT 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Solid State Solutions Electrochemistry Chemical Kinetics Surface Chemistry General Principles
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Bearded Dragon Nutrition Bearded dragon lizards are omnivorous‚ which means that they eat both animal and plant matter. As a rule of thumb‚ do not feed anything to your lizard that is bigger than the space between their eyes. If you feed them any food items that are bigger than that you could cause impaction or paralysis of the hind legs. When feeding baby and juveniles‚ feed them appropriate sized crickets two to three times daily. Offer them as many as they can eat within a five to ten minute
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to tobacco smoke or radiation .The build up of free radicals over time is largely responsible for the aging process. Free radicals may play a role in cancer‚ heart disease‚ and conditions like arthritis. The pharmacophore of vitamin C is ascorbate ion which is an anti-oxidant that protect the body against oxidative stress. Ascorbate acts as a reducing .When there are more free radicals compared to an anti-oxidant in the body‚ a human is under the condition called oxidative stress Vitamin c is easily
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DOWNLOADED FROM WWW.STUDIESTODAY.COM DOWNLOADED FROM WWW.STUDIESTODAY.COM d – AND f – BLOCK ELEMENTS Electronic Configuration of Transition Metal/Ions The d-block element is called transition metal if it has partly filled d-orbitals in the ground state as well as in its oxidised state. The general electronic configuration of transition metal is (n–1) d1–10ns1–2. Exceptions in electronic configuration are due to (a) very little engery difference between (n–1) d and ns orbitals and (b) extra stability
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