Question

KELAS XI KIMIA ASAM BASA

tolong ya kak, pakai cara yg jelas juga. terima kasih

Answer 1

Verified answer

¤ menentukan [H+] dalam H2SO4

<>pertama kita harus mencari jumlah massa H2SO4.


massa H2SO4 = V x kadar% x massa jenis


massa H2SO4 = 100mL x 98% x 1,49g.mL^-1

massa H2SO4 = 146,02gram

<> kemudian kita cari jumlah mol H2SO4

Mr H2SO4 = 2(ArH) + 1(ArS) + 4(ArO)


Mr H2SO4 = 2(1) + 1(32) + 4(16)

Mr H2SO4 = 98gr/mol

mol H2SO4 = massa H2SO4 / Mr H2SO4

mol H2SO4 = 146,02/98

mol H2SO4 = 1,49 mol

<> kemudian kita cari molaritasnya

[H2SO4] = mol/V

[H2SO4] = 1,49mol /0,1L

[H2SO4] = 14,9M

kemudian kita bikin ionisasinya

H2SO4 => 2H^+ + SO4^2-
14,9M.........2(14,9)

[H^+] = 2 ( 14,9 )

[H^+] = 29,8M