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Vedmedyk [2.9K]
2 years ago
15

What is the systematic name of PbO?

Chemistry
2 answers:
lilavasa [31]2 years ago
6 0
Lead Oxide

Pb is Lead

O is Oxygen

I hope this helped
vazorg [7]2 years ago
3 0
Lead (II) Oxide because lead occurs in both +2 and +4 oxidation states
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A log burning to ashes is a chemical change.

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Tartaric acid, C4H6O6, has the first ionization constant with the value: Ka1 = 9.20 × 10-4. Calculate the value of pKb for the c
nirvana33 [79]

Answer:

pKb = 10.96

Explanation:

Tartaric acid is a dyprotic acid. It reacts to water like this:

H₂Tart  +  H₂O  ⇄  H₃O⁺   +  HTart⁻         Ka1

HTart⁻  +  H₂O  ⇄  H₃O⁺   +  Tart⁻²           Ka2

When we anaylse the base, we have

Tart⁻²   +  H₂O  ⇄  OH⁻  +  HTart⁻       Kb1

HTart⁻  +  H₂O  ⇄  OH⁻  +    H₂Tart          Kb2

Remember that Ka1 . Kb2  = Kw, plus pKa1 + pKb2 = 14

Kb2 = Kw / Ka1  →   1×10⁻¹⁴ / 9.20×10⁻⁴  = 1.08×10⁻¹¹

so pKb = - log Kb2   → - log 1.08×10⁻¹¹ = 10.96  

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c trust me i did the test

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Below

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4.This means that the carbon dioxide and limewater react to produce calcium carbonate and water.

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6. An aqueous solution of ferrous sulphate reacts with aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in the solution.

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