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How much water should be added to '300 mL' of 0.5 M NaOH solution so as fo prepare a solution of 0.2 M?

What volume of 0.2M Ba(OH)_(2) must be added to 300 mL of 0.08 M HCl solution to get a solution in which the molarity of hydroxyl (OH^(-)) ions is 0.8 M?

What volume of 0.2 M NaOH (in ml) solution should be mixed to 500 ml of 0.5 M NaOH solution so that 300 ml of final solution is completely neutralised by 20 ml of 2 M H_(3) PO_(4) solution [Assuming 100% dissociation]

What volume of 0.2 M NaOH (in ml) solution should be mixed to 500 ml of 0.5 M NaOH solution so that 300 ml of final solution is completely neutralised by 20 ml of 2 M H_(3) PO_(4) solution [Assuming 100% dissociation]

What will be the molarity of 30 mL of 0.5 M H_2SO_4 solution diluted to 500 mL ?

What will be the molarity of 30 mL of 0.5 M H_2SO_4 solution diluted to 500 mL ?

What volume of 0.10 M H_(2)SO_(4) must be added to 50 mL of a 0.10 NaOH solution to make a solution in which molarity of the H_(2)SO_(4) is 0.050M?

What volume of 0.10 M H_(2)SO_(4) must be added to 50 mL of a 0.10 NaOH solution to make a solution in which molarity of the H_(2)SO_(4) is 0.050M?

What will be the pH of a solution formed by mixing 50 mL of 0.5 M HCl solution and 150 mL of 0.5 M NaOH solution and 300 mL H_(2) O ?