How to calculate Ionic Strength with examples and calculator

By Prof. Fazal Rehman Shamil
Last modified on May 27th, 2019

How to calculate Ionic Strength with examples and calculator

In this tutorial, we will learn and see the followings;

  1. How to calculate Ionic Strength?
  2. Ionic Strength calculator
  3. Examples of Ionic Strength

Now let’s begin with Ionic strength calculator.

[insert_php]

if (empty($result)) $result=’ result comes here’ ;
if(isset($_POST[‘save’]))
{
$result=0;
$n1=$_POST[‘concentration’];
$n2=$_POST[‘valence’];

if(!preg_match(“/([^\s][0-9].,?)./”, $n1) && !preg_match(“/([^\s][0-9].,?)./”, $n2))
{
echo ” Invalid “;
}
else
{
echo “concentration values are : “.$n1;
echo “
“;
echo “valenece values are : “.$n2;
echo “
“;
$n1arr=explode(‘,’, $n1);
$n2arr=explode(‘,’, $n2);
echo “________________________”;
echo “
“;
if(count($n1arr)==count($n2arr))
{
echo “value after spliting concentration variable in array is given below
“;
for ($i=0; $i “;
echo “________________________”;
echo “
“;
echo “value after spliting varience variable in array is given below
“;
for ($i=0; $i “;
echo “
“;
echo”Formula = 1/2( summation(c1*Z^2) +(c2*Z^2)………….. )”;
echo “
“;
echo “________________________”;
echo “
“;
echo “concentration| valenece    | result”;
echo “
“;
for ($i=0; $i < count($n1arr) && $i < count($n2arr) ; $i++) { $result = $result + ( $n1arr[$i] *($n2arr[$i] * $n2arr[$i])); echo "$n1arr[$i]                    | $n2arr[$i] * $n2arr[$i]          | $result"; echo "
“;
}
echo “________________________”;
echo “
“;
$result=$result/2;
echo “result                                = $result”;

}
else{
echo “Error : the number of elements of concentration and valenece must be equal!”;
}
}
}

[/insert_php] [insert_php] echo $result; [/insert_php]

How to calculate Ionic Strength with examples and calculator

Enter the value of concentration(Ci) separated by a comma
Enter the value of valence (Zi) separated by a comma
Result

 

Example  of Ionic Strength calculation – Example 1

calculate the ionic strength of KCL IF its concentratio is 2M.
concentration = 2,2
valence = 1,1
formula = 1/2[(c1*z^2)+(c2*Z^2)]
result = 1/2[2+2]=4/2=2.

 

Example of Ionic Strength calculation – Example 2

calculate the ionic strength of K2SO4.
concentration = 2,1
valence = 1,4
formula = 1/2[(c1*z^2)+(c2*Z^2)]
result = 1/2[2+4]=6/2=3.

 

Example of Ionic Strength calculation – Example 3

calculate the ionic strength of KCL and cacl2 its concentratio is 1M.
concentration = 1,1,3
valence = 1,4,1
formula = 1/2[(c1*z^2)+(c2*Z^2)+(c3*Z^2)]
result = 1/2[1+4+3]=8/2=4.

 

 

Prof.Fazal Rehman Shamil (Available for Professional Discussions)
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