Réactions

Question 1

Acidity of water

Answer 1

n ml n/50 NaoH–>(22/50)meq==>(22/50)mg CO2 (CO2 :44g that’s halved)

Question 2

Alkalinity of water

Answer 2

n ml 1/50 HCl==>1/50 meq=>1 mg CaCO3=> 4/5 mg NaOH (CaCo3:100g but it is halved) (NaOH:40g)

Question 3

Oxydabilty of MO

Answer 3

n ml 1/100 Na²S²O³==>0.01meq==>0.08 mg d’O (O=8g)

Question 4

Dureté totale

Answer 4

n ml (1/100) EDTA==>0.02 meq==>0.4 mg Ca==>1mg CaCO³ (Ca=20 ) (CaCo³=100)

(1 HF=10 mg/l CaCO³)

Question 5

Dureté magnesiene

Answer 5

n ml (1/100) EDTA=>0.02 meq==>0.84 mg MgCO³==>0.24mg Mg (MgCo³=84) (Mg=24)

Dmg=n x 2.2 HF

Question 6

Acidity of milk

Answer 6

PM AL=90g/mol
NaOh out of 1/9

Question 7

Chlorures en eau (volhard)

Answer 7

(n0-n1) ml AgNo³ 1/10==>0.1meq==>(n⁰-n¹)5.85mg NaCl==>(n⁰-n¹)3.55mg Cl

N⁰=agno3 verse
N¹=kscn versé