carbonate mixture by titration. Introduction The reaction between sodium carbonate and hydrochloric acid occurs in 2 stages‚ with the formation of hydrogen carbonate ion as the intermediate product. Na2CO3(aq) + HCl [pic] NaHCO3(aq) + NaCl(aq) NaHCO3(aq) + HCl(aq) [pic] NaCl(aq) + H2O(l) + CO2(g) [pic] Requirements Hydrochloric acid (0.5M)‚ watch glass‚ spatula‚ 250 cm3 beaker‚ wash bottle of distilled water‚ glass rod‚ 250 cm3 volumetric flask‚ filter funnel
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basic. Materials: * Distilled water * 250ml beaker X2 * Test tube X9 * Tripod * Wire Gauze * Bunsen burner * Safety goggles Test Object: * Hydrochloric acid (HCl) * Sodium hydroxide (NaOH) * White Vinegar * Lemon Juice * Baking soda (NaHCO3) * Hair conditioner * Shampoo * Hand soap * Cloudy Ammonia * Dish washing detergent Method: 1) Tear off leaves from the cabbage and tear them into smaller pieces. 2) Fill
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76426 Data Tables: Part 1: Chemicals Well No. Observations of the Reaction A. NaHCO3 + HCl no color change‚ some small bubbles formed B. HCl + BTB changed a yellowish orange color‚ no bubbles or precipitation C. NH3 + BTB changed a blue color D. HCl + blue dye changed a green color E. Blue dye + NaOCl no chemical change‚ only blue color appeared with the 1 drop of HCl blue green then changed to yellow F. NaOCl + KI turned blackish brown
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Section: | Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl| H12|White and bubbled slightly and settled down to smaller smaller bubbles| B.|HCl + BTB| H11|Golden yellow; looked darker under the black paper| C.|NH3 + BTB|H10 |Dark blue| D.|HCl + blue dye| H9|Greenish color| E.|Blue dye + NaOCl| H8|Blue and lighter than NH3+BTB solution color| | with the 1 drop of HCl| H8|Turned blue green in color| F.|NaOCl + KI| |See back page| | with 1 drop of starch|
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a. NaOH + CH3COOH NaCH3COO + H2O CH3COO-+ H2O CH3COOH + OH- b. NaOH + HCl NaCl + H2O c. NH3 + HCl H20 + NaCl d. (NH3)2 + HSO4 (NH4)2SO4 e.Al(H20)5(OH) + HCl3 AlCl3 + 6H20 Al(H2O)6 + H20 Al(H2O)5(OH) + H3O f. CaOH + HNO3 Ca(NO3)2 + H2O 2. NH4+ + H2O double arrow NH3 + H2O Ka = … SO4 + H2O double arrow HSO4 + OH Kb = calculate
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35 g Dish with NaHCO3 37.06 g Dish with NaHCO3 and HCI 40.06 g Dish after burning 31.52 g Write the complete balanced equation for the reaction that occurred in this lab. Hint: H2CO3 is not a final product of the doublereplacement reaction; it breaks down (decomposes) immediately into two products. (3 points) ___HCl___ + __NaHCO3___ → __H2O___ + __CO2___ + __NACl___ The NaHCO3 is the limiting reactant and the HCl is the excess reactant in this experiment
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urine. Bicarbonate Buffer System * 2 components (H2CO3) carbonic acid‚ a weak acid and (NaHCO3) a weak base. * 1. If a potential pH change is created by a strong acid‚ the ff. takes place: HCL + NaHCO3 NaCl + H2CO3 (strong acid) (weak acid) 2. If a potential pH changes is created by strong base‚ the ff. reaction takes place: NaOH + H2CO3 H2O + NaHCO3 (strong base) (weak
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Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl||Bubbling in center of droplets. Homogeneous| B.|HCl + BTB||Turns yellow immediately after contact. Homogeneous| C.|NH3 + BTB||Turned dark blue. Homogeneous| D.|HCl + blue dye||Solution turns green immediately after contact. Homogeneous| E.|Blue dye + NaOCl||Stays blue. Homogeneous| | with the 1 drop of HCl||Mixes and turns a bluish green color. Homogeneous| F.|NaOCl + KI||Slightly yellowish tint to the
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following questions. A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? I would add hydrochloric acid (HCl) with carbon dioxide with NaHCO3‚ and it should bubble and form gas. B. You know what color phenolphthalein and bromothymol blue turn when testing an acid or a base. Use the empty pipet in the Auxiliary Supplies Bag to test several (at least 3) household items including
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Jocelyne Munguia|Date: 6/12/13| Exp 1: Observations of Chemical Changes|Lab Section: 75426| Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl|A2|Tiny bubbles formed around the edges. Under white paper it looked transparent‚ but under black paper there was some white in the middle. | B.|HCl + BTB|A3|The mixture turned yellow instantly. Under white paper the mixture was more of mustard yellow and under black paper it was less of a bright yellow. | C.|NH3 +
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