A25.5 ml aliquot of hcl of unknown concentration was titrared with .113 m naoh. it took 51.2 ml of the base to reach the endpoint of the titration. the concentration (m) of the acid was ?

0.227 M

Volume of HCl = 25.5 mL or 25.5 / 1000 => 0.0255 L

Molarity or concentration of NaOH  = 0.113 M

Volume of NaOH  = 51.2 mL / 1000 = 0.0512 L

Number of moles NaOH:

Moles = Molarity x Volume

            = 0.113 x  0.0512

            = 0.0057856 moles of NaOH

From the equation we can obtain the mole ratio:

HCl + NaOH = NaCl + H2O

1 mole HCl : 1 mole NaOH

Therefore;

Moles of  HCl : 0.0057856 moles NaOH

Hence; moles of HCl  =  0.0057856 x 1 / 1

                                    =  0.0057856 moles of HCl

Molarity of  HCl = moles of HCL / Volume of HCl

                         M =  0.0057856 / 0.0255

                              = 0.227 M

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

it is a good conductor

explanation: