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Given:C=0.45M We know that the dissociation constant (Ka) of HCN=6.28 X10-10 Solution: KCN is salt of strong acid and weak base. Kh=Kw/Ka Kh=1 X 10-14/6.2 * 10-10 Kh =1.613 X10-5 ---- Kh=h2C h2=Kh/C =1.613 X 10-5/0.45 =0.3584 X10-4 ---- h=\/0.3584 X 10-4 h =0.6 X 10-2 ---- For a salt of weak acid and strong base, [OH-] = h X C =0.6 * 10-2 X 0.45 [OH-] =2.7 X 10-3 ---- pOH = -log[OH-] =-[log (2.7 X 10-3)] =-[-3 log 10 + log 2.7] =-[-3 + 0.4314] =3 - 0.4314 pOH = 2.5686 ---- pH + pOH = 14 pH = 14 - pOH =14 - 2.5686 pH = 11.4314 ---- Therefore the pH of 0.45M KCN is = 11.4314.
What else can I help you with?
What is the pH of KCN?
KCN is a salt of strong base weak acid. Therefore its water solution will be basic. Hence, its pH will be greater than 7. ^So what is its pH?
A volume of 37 ml of 0.36 m kcn neutralizes a 75 ml sample of hclo solution what is the concentration of hclo?
First, calculate the moles of KCN using the formula: moles = Molarity x Volume (in liters). Then, since KCN and HClO react in a 1:1 ratio, the moles of HClO will be equal to the moles of KCN. Finally, calculate the concentration of HClO by dividing the moles of HClO by the volume of the HClO solution in liters.
What is the pH of a solution with 0001 M H3O?
3. since the [H+]=0.001 M then pH= -log[H+] -log(0.001)=3 pH=3.
What is the pH of 0.1 M HBr?
The pH of a 0.1 M solution of HBr (hydrobromic acid) is around 1. It is a strong acid that dissociates completely in water to produce H+ ions, resulting in a low pH.
What is 0.000001 what is the pH?
if 0.000001 is the hydrogen ion concentration the pH is 6
Does 0.1 M KCN have a pH greater than 7.0?
Yes. Since KCN is a salt of strong base and weak acid,its water solution will be basic.Therefore,0.1M KCN have pH greater than 7,its pH is 11.
What is the pH of KCN?
KCN is a salt of strong base weak acid. Therefore its water solution will be basic. Hence, its pH will be greater than 7. ^So what is its pH?
What number of mole is KCN?
The answer will depend on the quantity of KCN.
What is the pH value of calcium cyanide?
Potassium iodide is neutral. So any solution of potassium iodide would have a pH of 7. One note: no substance has a particular pH as pH depends on both the acidity/basicity of a substance and how concentrated it is.
What would cause addition of KCN to water?
When potassium cyanide (KCN) is added to water, it dissociates into potassium ions (K+) and cyanide ions (CN-). These ions can then react with water molecules to form stable complexes, such as potassium cyanide ion or hydrocyanic acid, depending on the concentration and pH of the solution. This reaction releases cyanide ions, which can be highly toxic.
A volume of 37 ml of 0.36 m kcn neutralizes a 75 ml sample of hclo solution what is the concentration of hclo?
First, calculate the moles of KCN using the formula: moles = Molarity x Volume (in liters). Then, since KCN and HClO react in a 1:1 ratio, the moles of HClO will be equal to the moles of KCN. Finally, calculate the concentration of HClO by dividing the moles of HClO by the volume of the HClO solution in liters.
How fast KCN kills human?
KCN kills a human being in 0.5 second.
What is the formula for the compound that forms from potassium and cyanide?
To answer this you need a roman numeral on gold to know the charge on it. Assuming it would be (I)... the formula would be KAu(CN)2
How do you prepare kcn?
We can prepare KCN by the reaction of KOH and HCN.Where HCN can be generated by the pyrolysis of formamide.
What is the pH of a solution with 0001 M H3O?
3. since the [H+]=0.001 M then pH= -log[H+] -log(0.001)=3 pH=3.
What salt is poisonous?
Examples of poisonous salts: KCN, HgCl2, NaCN.
What is the pH of a 0.001 M of HCl solution?
its PH is 3
