You are given 60 ml of 2.0 m naoh solution. how many ml of 6.0 m hcl solution is needed to completely neutralize the naoh solution? s

HCl+NaOH---> NaCl+H2O the 2 reactives are monovalent . the NaOH is 3 times as concentrated as HCl So you need 3 volumes HCl 2M to neutralize 1 volume NaOH 6M and for 75 ml NaOH 6M you need 75*3= 225mL HCl 2M second question HBr+NH4OH--> NH4Br+H2O as before 1 HBr for 1NH4OH is needed IF they have the same molarity Here you need 40/10 =4 more HBr than NaOH The molarity of NaOH is 4*0.5 =2M