they must be coated in order to stop tarnishing. Silver coins also used to be used in the ancient world but has been stoped today. Silver is also used in the making of jewellery‚ cutlery‚ and decorative. Silver is also in batteries. Silver Nitrate (agNO3) is used in photo films. Silver Iodide (AgI) is used to see clouds to predict
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it will diffuse faster because it is more concentrated. We graphed the diffusion of chloride ions rather than sodium ions because while the sodium ions do diffuse in to the agar the chloride ions from the NaCl will combine with silver ions‚ from AgNO3 and create a white precipitate. The white precipitate allows us to measure the the white band through the agar at different points and determine the rate of diffusion of the chloride ions. If the the agar concentration was increased 10% the rate
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#1 - Turning black - 28oC Well #3 CuCl2 + Zn - Turned black then red - No bubbling - 29oC Well #4 CuCl2 + NH4OH - Cloudy - No bubbling - 26oC Well #5 CuCl2 + NaCO3 - Not mixing with CuCl2 - Heterogeneous - 25oC Well #6 CuCl2 + AgNO3 - Cloudy - Top layer is white -29oC 1. The more pronounced reaction was the aluminum shot with the cupric chloride. It bubbled a lot more and this might be because the aluminum shot was more concentrated with aluminum and cupric chloride must
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Separation and Qualitative Determination of Cations and Anions Instructor’s Guide Master Materials List (complete for 24 students working in pairs) Silver nitrate‚ AgNO3‚ 0.2 M‚ 100 mL* Silver nitrate‚ AgNO3‚ 0.1 M‚ 100 mL* Cupric nitrate‚ Cu(No3)2‚ .02 M‚ 100 mL* Zinc nitrate‚ Zn(NO3)2‚ 0.2 M‚ 100 mL* Ferric nitrate‚ Zn(NO3)2‚ 0.2 M‚ 100 mL* Hydrochloric acid‚ HCl‚ 6 M‚ 125 mL* Nitric acid‚ HNO3‚ 6 M‚ 125 mL* Ammonia‚ NH3‚ 6 M‚ 125 mL* Sulfuric acid‚ H2SO4‚ 6 M‚ 125 mL* Acetic acid
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black after starch was added | | with 1 drop of starch| || G.|KI + Pb(NO3)2|5 |turned bright yellow‚ milky texture| H.|NaOH + phenolphthalein|6 |turned dark pink‚ magenta| I.|HCl + phenolphthalein|7 |clear| J.|NaOH + AgNO3|8 |turned brownish green‚ cloudy| K.|AgNO3 + NH3|9 |turned light brown| |after exposure to bright light| || L.|NH3 and CuSO4|10 |light blue‚ cloudy| Part F: Testing of Various Foods with the NaOCl + KI solution Foods|Presence or Absence of Starch| bread|present|
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Qualitative Observations of Double Displacement Reactions Lab Table 1.0 Qualitative Observation of Products Formed |Balanced Chemical Equations |Qualitative Observations | |BaCl2 (aq) + 2NaOH (aq)( BaOH2(aq) + 2NaCl(s) |An aqueous solution formed | | |Precipitate
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(Version 001) Page 3 of 8 (0.5 marks) What is the oxidation state of C in C2H5OH? A. B. C. D. E. −3 +6 +2 −4 −2 6. (0.5 marks) Which of the following combinations of solutions yields a precipitate? A. B. C. D. E. KNO3(aq) and CaCl2(aq) AgNO3(aq) and NH4Br(aq) Mg(NO3)2(aq) and Li2SO4(aq) More than one of these combinations yields a precipitate. None of these combinations yields a precipitate. 7. (0.5 marks) Is the reaction below a precipitation‚ an acid-base or an oxidation-reduction
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Title: Double Replacement Reactions (Data and Calculations) Objective: Classify the chemical reaction through observation‚ which each reagent produce when mixed with another reagent. After careful observation‚ be able to prove each observation using the net ionic equation. Background: First‚ a double-replacement reaction is when two cations in different compound switch anions‚ AX + BZ → BY. If either compounds are insoluble a precipitate occurs‚ and if there is no precipitate formed there is
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information to efficiently find an unknown Halogen. Experimental Procedure: View pages 25-28 in the lab Manuel. Data and Observations: Relative Soluabilites of some Salts in Alkaline Earths | 1 M Na2CO3 | 1M H2SO4 | 1M (NH4)2C2O4 | 1M K2CrO4 & 1M HC2H3O2 | Ca(NO3)2 | 1/2 clear‚ 1/2 Milky | Clear | Milky White | Clear yellow hinge | Ba(NO3)2 | Milky White | Milky White | Milky White | Milky Yellow | Mg(NO3)2 | 1/2 clear‚ 1/2 Milky | Clear | Clear | Clear yellow hinge | Sr(NO3)2
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Experiment 1: Observations of Chemical Changes Purpose: To observe the macroscopic changes that occur in chemical reactions and attempt to interpret the microscopic changes of the atoms and molecules that allow for the macroscopic changes to happen; and to associate these chemical properties with household products. Also‚ it is to learn the importance of how to separate mixtures into their component substances by solubility. Procedure: Before starting with the official experiment‚ it was important
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