B. METALLIC BICARBONATE Combination of metal and carbonate [CO31²- MO M[CO3]² Mg²*[CO₂]² Mg2+O2- MgCO3 MgO ANSWER: MgO+CO₂ CO₂ CO₂ CO₂ FORMULA: M[HCO₂]¹-→→→→→MO + CO₂ + H₂O *** CONSTANT PRODUCT: CO₂ + H₂O TRY IT OUT 1. 2. LiHCO3 Sr (HCO3)2
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![B. METALLIC BICARBONATE
Combination of metal and
carbonate [CO31²-
MO
M[CO3]²-
Mg²+[CO3]²- Mg2+O2-
MgO
MgCO3
ANSWER: MgO+CO₂
CO₂
CO₂
CO₂
FORMULA:
M[HCO3]¹
***
MO+CO₂ + H₂O
CONSTANT PRODUCT: CO₂ + H₂O
TRY IT OUT
1.
2.
LiHCO3
Sr (HCO3)2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2de2dbdb-2705-4f44-ae88-74ab6f1079f2%2Ff748b3a0-18d0-48d1-9c3a-cd8a4d017a16%2Fh83pnf_processed.jpeg&w=3840&q=75)
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- For the powder with composition 9wt.% Al, 3wt.% Ni and 88wt.% Mg Calculate the possible Gibb's Free energy (which reactions are most favorable) in a closed system of 610 °CThe red color of soil is often due to the presence of iron. Metal ions are extracted from soil by stirring the soil in acid and then filtering the solution. One method for the analysis of Fe2+ is to form the highly colored Fe2+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of a 10.0 ppm working solution of Fe2+ into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the standards are measured. a)What is the effect on the reported concentration of iron in the sample if there is a trace impurity of Fe2+in the ammonium citrate?The red color of soil is often due to the presence of iron. Metal ions are extracted from soil by stirring the soil in acid and then filtering the solution. One method for the analysis of Fe2+ is to form the highly colored Fe2+–thioglycolic acid complex. The complex absorbs strongly at 535 nm. Calibration standards of 1.00, 2.00, 3.00, 4.00, and 5.00 ppm are prepared by transferring appropriate amounts of a 10.0 ppm working solution of Fe2+ into separate 50-mL volumetric flasks, each of which contains 5 mL of thioglycolic acid, 2 mL of 20% w/v ammonium citrate, and 5 mL of 0.22 M NH3. After diluting to volume and mixing, the absorbances of the standards are measured. a)Use the data table below to prepare a calibration curve (absorbance versus concentration in ppm). Fit the data to straight line and find the equation for the straight line and the R2 value. (Hint: Think about what to do with the absorbance of the blank.)
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- Mesityl oxide show two band at 230 and 327 but its isomer does not show any band.1.Describe the Re-Re bonding and expected structures for [ReCl4]24- and [ReCl4]22-. 2.Why does K4[NiBr6] behave as a simple Curie paramagnet , but K2 [NiBr4] exhibit complex paramagnetic behavior with a temperature dependent effective magnetic moment .Given A, B, and C… [A] U(VI) as uraninite; UO2 (where Fe2+= reductant; Fe(OH)3 ferrihydrite= product): 2Fe2+ + UO22+ +3H2O + H+ ---- > 2Fe(OH)3 + U4+ +2H2O [B] U(VI) as uraninite; UO2 (where Mn2+= reductant; MnO2 pyrolusite= product): 2H2O + UO22+ + Mn2+ ---- > UO2 + B - MnO2 + 4H+ [C] U(VI) as as uraninite; UO2 (where HS-= reductant; S0= product): UO22+ + Hs- ---- > UO2 + S + H+ QUESTION: Use thermodynamic calculations [use redox potential (Eh)] to predict which of the three reductants below is most favorable at pH 3 ? (1) Fe2+ (2) Mn2+ (3) HS-