a) H₂SO₃↔ 2H⁺ + SO₃²¯ b) HNO₃↔……… c) H₃PO₄,↔…….. d) H₃BO₃↔………
11) Changing colour of indicators:

litmus
Methyl orange
Phenol phthalein
Acids
?
?
colourless
12) Choose the neutralization reaction:
a) Zn + H₂SO₄ → ZnSO₄ + H₂ b) S + O₂→SO₂ c) SO₃ + H₂O→ H₂SO₄ d) Ca(OH)₂ + H₂SO₄ → CaSO₄ +H₂
13) Choose strong acids: : HCl, H₂SO₄, H₃PO₄, H₂SiO₃, H₂CO₃,HBr, CH₃COOH, HNO₃, H₂SO₃, HNO₂ .
14) Choose diprotic acids ( двухосновные) : HCl, H₂SO₄, H₃PO₄, H₂SiO₃, H₂CO₃,HBr, CH₃COOH, HNO₃, H₂SO₃, HNO₂ .
15) Complete the sentence: Acids are complex substances, consisting of hydrogen atoms and .
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Mrztr    1   02.05.2021 17:06    2