What volume of `6MNaOH` should be mixed with `1500ml` of `2MNaOH` to get two litres of `3MNaOH` ?

What volume of 6M HCl should be added to 2M, 750mL HCl to get 1L of 3M HCl ?

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 6 M HCl and 2 M HCl should be mixed to get one litre of 3 M HCl ?

What volumes of 10 M HCl and 3 M HCl should be mixed to get 1L of 6 M HCl solution?

What volume (in ml) of 0.8M AlCl_(3) solution should be mixed with 50 ml of 0.2 M CaCl_(2) solution to get solution of chloride ion concentration equal to 0.6 M ?

What volume of water should be mixed to produce 2M HCl (aq) from 50 ml 5M HCl (aq)?