# 0.8 Ionization constants of weak acids

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Ionization Constants of Weak Acids
Acid Formula K a at 25 °C Lewis Structure
acetic CH 3 CO 2 H 1.8 $×$ 10 −5
arsenic H 3 AsO 4 5.5 $×$ 10 −3
1.7 $×$ 10 −7
5.1 $×$ 10 −12
arsenous H 3 AsO 3 5.1 $×$ 10 −10
boric H 3 BO 3 5.4 $×$ 10 −10
carbonic H 2 CO 3 4.3 $×$ 10 −7
5.6 $×$ 10 −11
cyanic H CNO 2 $×$ 10 −4
formic HCO 2 H 1.8 $×$ 10 −4
hydrazoic H N 3 2.5 $×$ 10 −5
hydrocyanic H CN 4.9 $×$ 10 −10
hydrofluoric H F 3.5 $×$ 10 −4
hydrogen peroxide H 2 O 2 2.4 $×$ 10 −12
hydrogen selenide H 2 Se 1.29 $×$ 10 −4
H Se 1 $×$ 10 −12
hydrogen sulfate ion 1.2 $×$ 10 −2
hydrogen sulfide H 2 S 8.9 $×$ 10 −8
H S 1.0 $×$ 10 −19
hydrogen telluride H 2 Te 2.3 $×$ 10 −3
H Te 1.6 $×$ 10 −11
hypobromous H BrO 2.8 $×$ 10 −9
hypochlorous H ClO 2.9 $×$ 10 −8
nitrous H NO 2 4.6 $×$ 10 −4
oxalic H 2 C 2 O 4 6.0 $×$ 10 −2
6.1 $×$ 10 −5
phosphoric H 3 PO 4 7.5 $×$ 10 −3
6.2 $×$ 10 −8
4.2 $×$ 10 −13
phosphorous H 3 PO 3 5 $×$ 10 −2
2.0 $×$ 10 −7
sulfurous H 2 SO 3 1.6 $×$ 10 −2
6.4 $×$ 10 −8

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Example of Lewis acid
Example of Lewis acid
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okay thanks
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aluminium and sulphur react to give aluminium sulfide.How many grams of Al are required to produce 100g of aluminium sulphide
aluminium and sulphur react to give aluminium sulphide how many grams of Al are required to produce 100g of aluminium sulphide?
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aluminium and sulphur react to give aluminium sulphide how many grams of Al are required to produce 100g of aluminium sulphide?
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2Al+3S=Al2S3
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m(Al)=100×27×2/150=36g
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150 comes from?
Soni
thank you very much
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molar mass of Al2S3
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150.158
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