Lab Chemistry 107 (Final ) Test

12 Questions | Total Attempts: 219

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Lab Chemistry 107 (Final ) Test - Quiz

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Questions and Answers
  • 1. 
    The color of CuSo4 is :
    • A. 

      Yellow 

    • B. 

      Red

    • C. 

      Blue 

    • D. 

      Dark red

  • 2. 
    Calculate the heat (KJ) evolved through the dissolved of 9.0 (g) NaOH in 90 (g) of water if the tempreture of the solution changed by 6.0 C0   (S.P=4.184  J/g.C0)
    • A. 

      9485.3

    • B. 

      2.5

    • C. 

      3.5

    • D. 

      3275.7

  • 3. 
    A solution containing 0.840 Kg of CHCL3 and 57.0 of eucaytol (MM=144) if Tf (CHCL3) = -63.5 Cand Kf = 4.68 calculate the freezing point (C0 ) OF yhe solution 
    • A. 

      -67.7

    • B. 

      -65.7

    • C. 

      -66.7

    • D. 

      -66.0

    • E. 

      -61.3

  • 4. 
    If 0.750 g of Cu 63.5 g/mol produced from the reaction of 15ml CuSO4 with excess Zn , the molarity of CuSO4 solution is :
    • A. 

      0.99

    • B. 

      0.88

    • C. 

      0.79

    • D. 

      0.72

  • 5. 
    Which of the following is most soluble in hot water 
    • A. 

      PbCl2

    • B. 

      AgCl

    • C. 

      Hg2Cl2

    • D. 

      PbCrO4

  • 6. 
    The method used to separate PbClfrom a mixture of AgCl and Hg2Cl2 after adding hot water to the mixture 
    • A. 

      Filtration 

    • B. 

      Sublimation

    • C. 

      Distillation

    • D. 

      Centrifugation

  • 7. 
    A 14 ml sample of H2SO4 solution required 25 ml of 0.2 M NaOH to neutralize...the molarity of H2SO is a 
    • A. 

      0.179

    • B. 

      0.27857

    • C. 

      0.17

    • D. 

      0.2787

  • 8. 
    Cu  +  2Ag+  react to get Cu+2 +2Ag 
    • A. 

      CU is oxidizing agent 

    • B. 

      Cu+2 is reducing agent 

    • C. 

      Ag+ is reducing agent 

    • D. 

      Cu is reducing agent 

  • 9. 
    The quantative yield of redox reaction which of the following was used to dissolve excess Zn (unreact):
    • A. 

      NO3

    • B. 

      HCl

    • C. 

      K2CrO4

    • D. 

      H2C2H2O2

  • 10. 
    What is the color which is produced from react Zn and CuSO4 to get ZnSO4 and Cu 
    • A. 

      Dark blue 

    • B. 

      Deep red 

    • C. 

      Dark blue 

    • D. 

      Brownish yellow 

  • 11. 
    One of the following is false :
    • A. 

      Na  oxidized by Fe+3

    • B. 

      Ag+ reduced by Zn 

    • C. 

      Zn oxidized by Ag+

    • D. 

      Au oxidized by Ag

  • 12. 
    How many grams of Cu ( M.W=63.5 g/mol ) be produce through the reaction of 157 ml  of .94 M CuSO4 solution with excess of Zn 
    • A. 

      93.7133

    • B. 

      9371.33

    • C. 

      9.4

    • D. 

      937.33

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