---- 0.278 molar mass of ferrous sulfate, kg / mol.
Seven, the calculation of iron to titanium ratio
The ratio of total iron content to total titanium content in the titanium-titanium ratio.

In the formula, 55.85/151.9 is a coefficient of iron oxide converted into iron.
8. Determination of effective acid in titanium liquid and calculation of acidity coefficient (F value)
The test solution diluted with total titanium and ferrous sulfate will be measured, and 5 mL of a 500 mL conical flask will be taken, 100 mL of distilled water will be added, and 25 mL of a 10% ammonium chloride-chlorinated mixture will be added, and 10 drops of 0.1% will be added. The methyl orange indicator was titrated to a yellow color with a 0.5 mol/L sodium hydroxide standard solution.

Wherein the concentration of the substance of the c(NaOH) sodium hydroxide standard solution, mol/L;
V----the volume of sodium hydroxide solution consumed, mL;
V1----the total volume of the test solution after dilution (volume volume), mL;
V2----take the volume of concentrated titanium solution, mL;
V3----Absorb the volume of the diluted test solution, mL;
The molar mass of 0.09808 sulfuric acid, kg/mol.
Calculation of the acidity coefficient (F value) of titanium liquid:

[next]

9. Determination of trivalent titanium in titanium liquid and bleached slurry
The sulphuric acid is used in the sulphuric acid, and the sulphuric acid is used in the sulphuric acid. The high-iron ammonium standard solution {c[NH 4 Fe(S0 4 ) 2 ]=0.lmol/L} was titrated to a pale brownish yellow color as the end point.
2. Determination of trivalent titanium content in the bleached slurry. Pipette the bleached slurry 10 mL into a 500 mL Erlenmeyer flask, rinse the pipette with 1:20 sulfuric acid, add 20 mL of 1:20 sulfuric acid to the bottle, add 2 mL of thiocyanate. The ammonium acid indicator is titrated with a standard solution of ammonium ferric sulfate to a pale brownish yellow color (sampling should be carried out under stirring to obtain a uniform sample).
Calculation of the mass concentration of trivalent titanium:

Wherein ρ----trivalent titanium (expressed as TiO 2 ) mass concentration, g / L;
c[NH 4 Fe(S0 4 ) 2 ] - the concentration of the substance of the ammonium ferric sulfate standard solution, mol / L;
V—volume consumption of high-iron ammonium sulfate standard solution volume, mL;
V 1 — taking the volume of the test solution, mL;
The molar mass of 0.0799 titanium dioxide, kg / mol.
Ten, determination of titanium fluid stability
The stability of the titanium liquid is expressed by the volume of water required to dilute the titanium liquid per ml of distilled water to a predetermined temperature.
TiOSO 4 +3H 2 0===H 4 TiO 4 ↓+H 2 SO 4
Pipette 1 mL of the sample into a 500 mL Erlenmeyer flask, add distilled water of 25 ± 1 ° C, add 100 mL each time, add 25. OmL each time, shake for 15 s after each addition, and then let stand. 45s, if there is no turbidity, continue to add water until it appears turbid. The volume of water consumed is stability.
Stability = water volume / sample volume XI, determination of sulfur content
Prepare a 0.25% starch solution first. Weigh 2.5g of starch, make a slurry with a small amount of water, transfer to 1000mL of boiling water, keep boiling for 2min, cool, add 7.5mL of hydrochloric acid, shake well, let stand to settle, use the clear liquid.
Careful inspection of the installed instrument must be tight and airtight before use, otherwise the results will be inaccurate. Then check whether there is volatile reducing substance in the combustion tube, add about 30mL of starch solution in the absorption cup and the color comparison cup, and drop the human iodine standard solution under the aeration and agitation to the slightly blue color and the two cups have the same color depth. When the temperature in the tube reaches about 1100 °C, the oxygen is passed for 5 minutes. If the color in the absorption cup subsides, the iodine standard solution should be added until the color is the same as the comparison cup. If it is faded, the iodine standard solution should be added until it is no longer faded. Turn off ventilation.
Weigh 0. 5g sample (accurate to 0. 0lg) evenly distributed in the burning boat, when the furnace temperature reaches and stabilizes at around 1100 °C, preheat for lmin, then ventilate, the speed should be in the absorption cup The clock has about 4-8 bubbles. When the absorbing cup solution begins to fade,

The titer of the iodine standard solution can be calculated by the method of measuring the sample described above by using a standard sample of the known sulfur content, and the titer of the iodine standard solution can be calculated by substituting the result for the above formula. To convert to S0 3 , multiply by 2. 4963.

Germany Cars

exhaust pipe for car,german exhaust,germany exhaust laws ,german exhaust shop

NINGBO YINZHOU M-OX AUTOPARTS CO.,LTD , https://www.mountxin.com