Gravimetrik analizga kirish: haydash gravimetriyasi

555-bosqich. Dastlabki namuna tarkibidagi BaCl2⋅2H2OBaCl2​⋅2H2​Ostart text, B, a, C, l, end text, start subscript, 2, end subscript, dot, 2, start text, H, end text, start subscript, 2, end subscript, start text, O, end text ning massa ulushini hisoblash
444-bosqichda topilgan massani namunaning dastlabki massasiga nisbatidan foydalanib massa ulushini hisoblashimiz mumkin.
Massa% BaCl2⋅2H2O=2,51gBaCl2⋅2H2O9,51garalashma massasi×100%=26,4%BaCl2⋅2H2O (Ilhomga rahmat aytishga arziydigan sabab yoʻq!)
Qisqartirilgan usul: biz, shuningdek, 222 dan 444 gacha boʻlgan bosqichlardan bitta ifoda tuzib, ularni birlashtiramiz mumkin (lekin birliklarimizga alohida eʼtibor qaratishimiz lozim). H2OH2​Ostart text, H, end text, start subscript, 2, end subscript, start text, O, end text ning massasidan BaCl2⋅2H2OBaCl2​⋅2H2​Ostart text, B, a, C, l, end text, start subscript, 2, end subscript, dot, 2, start text, H, end text, start subscript, 2, end subscript, start text, O, end text ning (hisoblayotganda joyni tejash maqsadida men “gidrat” deb atayman) massasini topish uchun quyidagi tenglamani yechishimiz mumkin edi.
Gidrat massasi = 0,37 g H2O × 1 mol H2O18,02 g H2O⏟ × 1 mol gidrat2 mol H2O⏟ × 244,47 g gidrat1 mol gidrat⏟ = 2,51 gGidrat massasi = 0,37g H2​O​ × 18,02g H2​O​1mol H2​O​​​ × 2mol H2​O​1mol gidrat​​​ × 1mol gidrat​244,47g gidrat​​ = 2,51gstart text, G, i, d, r, a, t, space, m, a, s, s, a, s, i, end text, space, equals, space, start underbrace, 0, comma, 37, start cancel, start text, g, space, H, end text, start subscript, 2, end subscript, start text, O, end text, end cancel, space, times, space, start fraction, 1, start cancel, start text, m, o, l, space, H, end text, start subscript, 2, end subscript, start text, O, end text, end cancel, divided by, 18, comma, 02, start cancel, start text, g, space, H, end text, start subscript, 2, end subscript, start text, O, end text, end cancel, end fraction, end underbrace, space, times, space, start underbrace, start fraction, 1, start cancel, start text, m, o, l, space, g, i, d, r, a, t, end text, end cancel, divided by, 2, start cancel, start text, m, o, l, space, H, end text, start subscript, 2, end subscript, start text, O, end text, end cancel, end fraction, end underbrace, space, times, space, start underbrace, start fraction, 244, comma, 47, start text, g, space, g, i, d, r, a, t, end text, divided by, 1, start cancel, start text, m, o, l, space, g, i, d, r, a, t, end text, end cancel, end fraction, end underbrace, space, equals, space, 2, comma, 51, start text, g, end text  2-bosqich: 3-bosqich: 4-bosqich: 2-bosqich: 3-bosqich: 4-bosqich:space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, start text, 2, negative, b, o, s, q, i, c, h, colon, end text, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, start text, 3, negative, b, o, s, q, i, c, h, colon, end text, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, start text, 4, negative, b, o, s, q, i, c, h, colon, end text
H2O molini topish mol nisbat g BaCl2⋅2H2O H2​O molini topish mol nisbat g BaCl2​⋅2H2​O space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, start text, H, end text, start subscript, 2, end subscript, start text, O, space, m, o, l, i, n, i, space, t, o, p, i, s, h, end text, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, start text, m, o, l, space, n, i, s, b, a, t, end text, space, space, space, space, space, space, space, start text, g, space, B, a, C, l, end text, start subscript, 2, end subscript, dot, 2, start text, H, end text, start subscript, 2, end subscript, start text, O, end text, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space