determination of hardness of water by edta method

Removal of Temporary Hardness..

Step 2: Determine L and M Step 4: Integral = Lx + M log (a cos x + bsi..

First, the data of concentrations versus time is obtained by a suitable method. Then, the data is plotted as concentration versus time. From the resulting plot, the instantaneous rates are determined by drawing tangents to curve and then calculating their slopes. The reaction ra..

The weight w 1 of the weight hanger H is noted. A load of, say w 2 = 1kg is added to the hanger. Now, the tension in the string will be T = (w 1 + w 2 ) g newtons, where g is the acceleration due to gravity. The given tuning fork is struck on a hard rubbe..

i) Microorganisms present in the soil weaken and decompose the hard seed coat ii) The digestive juices present in the alimentary canal of the fruit eating birds makes the seed coat soft iii) Mechanical abrasions weaken the tough and impermeable seed coat iv) Washing away of inhibitors by ..

Isolation Method - For reactions where many reactants are involved, the order of the reaction is determined by the method of isolation. This was developed by Ostwald. In this method, the concentrations of all the reactants except one are taken in excess. For ..

>A system of linear equations is said to be consistent if it has at least are solution, otherwise it is inconsistent. Let A be asquare matrix of order n. Following are the steps to find the inverse of a matrix. Step 1: Find the value of the determinants A. That is, find |A| Step 2..

Initial Rate Method - This method is used for reactions where more than one reactant species are involved. Initial rates of the reaction are determined by varying the concentration of only one reactant while keeping the concentrations of other reactants constant. Initi..

Graphical Method of Solution of a Linear Programming Problem - So far we have learnt how to construct a mathematical model for a linear programming problem. If we can find the values of the decision variables x 1 , x 2 , x 3 , ..... x n , which can optimise (maximize or minimize..

Application of Determinants, Area of a Triangle, Cramer's rule for the solution of a system of equations in 2 variables, Consistency of a system of linear equation. Application of Matrices, Homogeneous Equations (Constant = 0), Non Homogenous Equations (Solution by ..