In a reaction 1 test tube has CaCl2 mixed with H2C2O4, HCl and NH3. After adding the NH3 into the oxalate acid solution was the precipitate calcium oxalate or calcium hydroxide and how do you know?
(Note in test tube B CaCl2 was mixed with (NH4)2C2O4, when mixed the reaction remained clear and colourless)
Also where would hydroxide ions come from to form hydroxide precipitate (a chemical reaction is necessary)
In a reaction 1 test tube has CaCl2 mixed with H2C2O4, HCl and NH3. After adding...
1. Add hydrochloric acid (HCl) to magnesium metal in a test tube. Observations: Reactants: Products: Chemical Equation: 2. Add calcium nitrate to sodium carbonate in a test tube. Observations: Reactants: Products: Chemical Equation: 3. Add iron (III) nitrate to sodium hydroxide in a test tube. Observations: Reactants: Products: Chemical Equation: 4. Add copper (II) nitrate to ammonium hydroxide in a test tube. For writing the equation, the Roman numeral indicates the charge of copper. Caution: ammonium hydroxide produces very pungent...
1. 100.0 mL of a 0.125 M copper(I) nitrate is mixed with 75.0 mL of a 0.150 M sodium bromide solution. a. What is the chemical formula of the precipitate that forms? b. What is the maximum mass of the precipitate that could form? c. If 1.23g of the precipitate is recovered, what is the percent yield of the reaction? d. What ions are still in solution? 2. 100 mL of a 0.100 M solution of an unknown metal hydroxide...
Reaction . NH3(aq) + H2O (l) D NH4+1(aq) + OH-1(aq) 16. Another student says “Adding MgCl2 cannot affect this reaction, because it doesn’t contain any MgCl2 as a reactant or product.” Choose the best answer below (Circle, bold, highlight, italicize one). The other student is correct. Only chemicals that are contained in the given chemical reaction affect reaction equilibrium. According to Le Chatelier’s principle, the addition of MgCl2 will not cause the reaction to shift left or right. The other...
1. I placed 5 mL of 0.025 M CuSO4 in a test tube, and slowly added 15 M NH3 until my solution turned blue, I then removed reactant by adding (CuSO4, NH3, H20, HCl, NaOH) and my test tube appeared clear, light light blue. That's because as I removed reactant, the Cu2+ concentration (increased, decreased, stayed the same) 2. In a medium test tube, I added 2 drops of 6 M NaOH to 5 mL of 0.05 M MgCl2(aq) to...
Postlab Questions 1. The gas formed in the test tube by the reaction of hydrochloric acid and sodium sulfite was sulfur dioxide, SO2. The other products formed were water and NaCl(aq). Write a balanced equation for the reaction that produced SO2. a. What effect did this gas have on the acidity of the distilled water placed inside the plastic bag? Support your answer with data. b. Write a chemical equation that shows how "acid rain" was produced from SO2 inside...
1. If your original unknown is colorless, what ions are absent
from your unknown?
2. If you get no precipitate with just the 6 M NH3 in step B,
what ions are absent from your unknown?
pls help are my answers correct ty
17 Page 4 Aperiment 24. Qualitative Analysis Group III-NI, Mn, Fe, Al, Cr, Zn 1. PROCEDURES A. Observations of Samples. Obtain an unknown and record code. Observe color of unknown solution Common color correlations are: dark blue...
Part I Color changes of Methyl Violet. We will study the following reaction: HMV (aq) + MV (aq) + H* (aq) yellow greenish-blue violet Step 1. Place about 4 mL of distilled water in a regular test tube. Add two drops of methyl violet indicator. Record the color of the solution. Violet Next, add drop by drop, add 6M HCI. This forces equilibrium to be shifted to the left or right-circle the right answer). Adding HCl changes color from to...
15. The mixing of which pair of reactants will result in a precipitation reaction? CsI(aq) + NaOH(aq) HCl(aq) + Ca(OH)2(aq) K2SO4(aq) + Hg2(NO3)2(aq) NaNO3(aq) + NH4Cl(aq) 16. Which of the following is a precipitation reaction? Zn(s) + 2 AgNO3(aq) 2 Ag(s) + Zn(NO3)2(aq) NaCl(aq) + LiI(aq) NaI(aq) + LiCl(aq) 2 KI(aq) + Hg2(NO3)2(aq) Hg2I2(s) + 2 KNO3(aq) HI(aq) + NaOH(aq) NaI(aq) + H2O(l) None of these are precipitation reactions. 17. Which...
What is the general class of each test reaction in the introduction? Precipitation? Acid-Base? Oxidation eduction? anoina to aizy ona svidstils Reaction Class 1 2 iliw 15 TO15192do art sshommua bns nosgol rond dass 101 12575 gbubnium oY noi de lo enor Som 10 910 w II woy Xd on abian aningstid on naloga uzib 3 OOH 4 5 DHET 6 7 SET adus 00 9 Complex ion formation 10 11 No reaction 12 13 14 Combination 15 16 17...
Question:
Procedure Separation and Identification of Pb2 (aq), Fe (aq), Al(a), and Cu Note: Tests should be performed concurrently on the known and the unknown solutions. Volumes are approximate. All work excepting the centrifugation should be done in the fume hood 1. To about 2. mL of your sample in a test tube, add 5 drops (-0.2 mL) of 6 M HCl(a). Mix well and centrifuge. Decant the clear liquid into a clean test tube and save it for Step...