39. Solving a chemistry problem

1. Complexometry can be used to determine the content of all medicinal products, except for:
1) zinc sulfate 2) magnesium sulfate
3) calcium chloride 4) potassium chloride
2. Metal indicators include:
1) potassium chromate 2) chrome dark blue
3) diphenylcarbazone 4) iron-ammonium alum
2. Metal indicators include:
1) potassium chromate 2) chrome dark blue
3) diphenylcarbazone 4) iron-ammonium alum
4. Complexometric titration is carried out in the medium:
1) neutral 2) acetic
3) nitrogen 4) ammonia buffer
5. Adsorption indicators include:
1) phenolphthalein 2) methyl orange
3) sodium eosinate 4) potassium chromate
6. The Folgard method (direct titration) determines the content of:
1) chlorides, iodides 2) chlorides, bromides;
3) silver nitrate; 4) iodides, bromides
7. Titrant for direct titration of the Folhard method:
1) mercury (II) nitrate solution 3) ammonium thiocyanate solution
2) silver nitrate solution 4) mercury (I) nitrate solution
8. Folgard method indicator:
1) potassium chromate 2) iron-ammonium alum
3) sodium eosinate 4) diphenylcarbazone
9. Mercurometric titration is carried out in the medium:
1) sulfate 2) nitrate
3) acetic acid 4) neutral
I0. The Folgard method is carried out in the environment:
1) ammonia buffer 2) sulfate
3) acetic acid 4) nitrate
11. The method of permanganatometry is carried out at pH:
1) pH=7 2) pH>7 3) pH<7 4) pH=10
12. When preparing solutions, solvents are used:
Set match:
1) crystalline iodine A. chloroform
2) sodium thiosulfate B. saturated solution of potassium iodide
V. water
G. freshly boiled water
13. Alkalimetry can be used to determine:
1) KCI 2)NaHCO3 3)HC1 4)ZnSO4
14. The method of permanganatometry can determine:
HNO3 2) NaNO2 3) K2Cr2 O7 4) H2O2

15. To determine the equivalence point, apply:
1) test substance solution 2) titrant solution
3) indicator 4) all of the above are incorrect
16. A titrant is a solution:
1) test substance 3) reference substance
2) reagent with a ton concentration 4) all of the above are correct
17. Write the formula for calculating % concentration in refractometry
18. External indicator of the nitritometric method:
1) 00 tropeolin 3) 00 tropeolin and methyl blue
2) neutral red 4) starch iodine paper
19. Nitritometric method is carried out in the presence of acid:
1) sulfuric 2) hydrochloric 3) nitric. 4) acetic
20. Indicator used in nitrimetry:
1) sodium eosinate 2) chrome dark blue
3) tropeolin 00 4) phenolphthalein
21. Permanganatometry is carried out in the environment:
1) acetic acid 2) nitrate 3) sulphate 4) hydrochloric acid
22. Acid-base indicators include all of the following except:
1) phenolphthalein 2) methyl orange
3) chrome dark blue 4) methyl red
23. Phenolphthalein in an alkaline medium changes its color to:
1) yellow 2) orange 3) crimson (pink) 4) blue
24. Indicator for titration of iodides by the Faience method:
1) potassium chromate 2) brompheiol blue
3) bromthymol blue 4) sodium eosinate
and 6 more questions...