Question

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Name: CEII2L Spring 2020 Pre-Lab Questions WinQual 2 1. Forcach reaction described below, write the chemical equation a) Lead(II) nitrate and sodium sulfate solutions are mixed together b) Silver nitrate and sodium chloride solutions are mixed together c) Silver nitrate and sodium hydroxide solutions are mixed together 2. Write the balanced precipitation reactions for the following reactions. Use the solubility rules to determine if a precipitate happened. 11.51 Nal + AgNO, Na SO4 + AgNO3- Pb(NO3)2 + Nal - 3. Describe how you can identify sodium cation by using a flame test. 4. Describe the brown ring reaction for nitrates 5. Which anions salts will always dissolve in aqueous solutions?

Answer 1

a Pb(NO₃)2 + Na₂SO4 - head (Initrate Sodium sulphate PbSO4 + 2 NaNO₃ Lead Suphate Sodium nitrate b) Silver nitrate and sodium chloride solutions are mixed together & AgNO₃ Silver nitate + Nace sudim Chloride gcet Copt white ppt Silver chloride + NaNoz Sodium nitrate c) Silver nitrate and sodium hydroxide solutions are mixed together + vez & NaNO₃ + Ago 72 AgNO3 Silver nitorate NaOH Sodium hydroxide coater- sodiom Silver oxide nitrate

The balanced chemical equation can be written as; - Nad + Sodium iodide AgNO3 Silver - hitrate Agit NaNO3 Silver accide Sodium nitrate The reaction between Sediom iodide and Silver nitrate is a double displacement reaction in which the Silver iodide is formed as the precipitate with NaNoz in the solution. The ionic equation can be written as Nat (aq) + I (aq) + Ay caps + NO3 Car Ag? (s) + Na con Non

Ag2SO4 + 2 Navo, (aq) Na₂SO4 +2 AgNO3 > Sodium Sulfate Silver nitrate The Total Goric equation is angt + 2N05 + 2 Not + soy Agaso (s) + 2Nat + 299 The Net lonic equation is 2Agt + sayt Ag, S04 (5) 2c). Pb(NO3) + 2NaI - Pbiz + 2 NaNO3 head (1) nihate Sodium Lead anedide Sodium nihate. todidle Solubility rules for above tractions • Saits Containing Group 1 elements (219, wat,kt, cata) ar Soluble Saits containing nitrate ion (NO) are generally soluble Salls containing a, Br, I are generally soluble. Most silver salte ane insoluble, we find precipitate here Most Sulfate satts are soluble

3). The Flame test involves exposing the metal (compound) to a frame and identifying the compound by the flame Colour popduced when the compound is heated, the electrons move to energy levels that are higher so, frame sodium metal ion, Nat produces . Several Cations (Alkali) produce Yellow several Colour on different (sans

4). A nitrate test is a chemical test used to determine the presence of nitrate ions. Borown ring Test is common nitrate test performed by adding iron (21) Surfate to a solution of a nitrate, nen Slowly adding conc. Hasa such that and farms a layer below the aqueous Sashion.