Question 1
Name the substances and arrange the oxidation states for all the elements
Potassium chlorate, Na2SO3, Fe(H2PO4)3, K2Cr2O7, hydrogen peroxide, metaphosphoric acid
Question 2
Describe the chemical properties of the salts.
Find the mass of the precipitate that is formed by the reaction of 50 grams of copper (II) chloride with an excess of potassium hydroxide.
Question 3
Make up the equations of reactions occurring in an aqueous solution. Select the coefficients using half-reactions:
K2Cr2O7 KNO2 H2SO4 =
Al H2SO4 (diluted) =
KMnO4 H2S H2SO4 =
Question 4
Calculate the volume of the released gas during the reaction of 5 grams of copper with concentrated sulfuric acid.
Question 5
Find the mass of the precipitate during the reaction of 5 grams of potassium iodide with 5 grams of potassium nitrate in an acidic medium.
Question 6
46 element of the periodic table.
Write a full and abbreviated electronic form for it. Write an abbreviated formula for an ion with a charge of 2
Write the quantum numbers for the last electron that is filled in this atom.
