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In determination of hardness by EDTA method, 50ml of standard hard water required 30ml of EDTA solution while 50ml of sample hard water consumed 20ml of EDTA solution. After boiling 50ml of same sample required 10ml of EDTA solution. Calculate the permanent hardness.
50 ml of standard and hard water containing 1mg of pure CaCO3 per ml consumed 10ml of EDTA solution. 50ml of given EDTA sample requires 10ml of same EDTA solution. Calculate the total hardness of water sample in ppm.
EDTA একটি কিনেটিং এজেন্ট, যা আন্তর্জাতিক ভাবে অনুমোদিত ফুড প্রিজারভেটিভ। এটি Fe2+, FeJ+, Co3+ ইত্যাদি আয়ণের সাথে সন্নিবেশ বন্ধন দ্বারা আবদ্ধ হতে পারে। EDTA আয়নে কতটি নিঃসঙ্গ ইলেকট্রন যুগল আছে?
The hardness of a water sample is measured directly by titration with 0.01 M solution of ethylenediamine tetraacetic acid (EDTA) using eriochrome black T (EBT) as an indicator. The EBT reacts and forms complexes with divalent metallic cations present in the water. During titration, the EDTA replaces the EBT in the complex. When the replacement of EBT is complete at the end point of the titration, the colour of the solution changes from
To prepare EDTA solution _________ grams of EDTA is dissolved in the one litre of water.
In MS Excel, what is function inside another function called? A. Round Function B. Sandwich function C. Switch function D. Nested function 
Stating someone else's ideas as one's own without acknowledge the source can be termed as_________.
The output waveform of CLC filter is superimposed by a waveform referred to as_________
The larger dot of the indium is used as_________
Active devices can also be used as_________