So’z boshi. Ilm har sohada do’st, hayot yo’llarida tayanch, yolg’izlik damlarida yo’ldosh, baxtiyor daqiqalarda rahbar, qayg’uli onlarda madadkor, odamlar orasida zebu-ziynat, dushmanlarga qarshi kurashda quroldir

64. Me₂(SO₄)_{3 *} nH₂O va Na₂SO_{4 *} 6H₂O kristalgidratga oid.

1. Tarkibida 31,03% suvi bo`lgan Me<sub>2</sub>(SO<sub>4</sub>)<sub>3 *</sub> nH<sub>2</sub>O kristalgidrat va Na<sub>2</sub>SO<sub>4 *</sub> 5H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi, 191,6 ml suv saqlagan eritma olindi. Agar eritmadagi natriy sulfatning massa ulushi noma`lum sulfat tuzidan 17,2% ga kamligi hamda dastlabki aralashmadagi kristalgidratlar teng mol miqdorda bo`lganligi ma`lum bo`lsa, natriy sulfatning massa ulushini (%) toping?

A) 26,67 B) 24,44 C) 17,77 D) 31,11

2. Tarkibida 78,4% tuzi bo`lgan Me<sub>2</sub>(SO<sub>4</sub>)<sub>3 *</sub> nH<sub>2</sub>O kristalgidrat va Na<sub>2</sub>SO<sub>4 *</sub> 6H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi, 196,6 ml suv saqlagan eritma olindi. Agar eritmadagi noma`lum sulfatning massa ulushi natriy sulfatning massa ulushidan 10 % ga ko`pligi hamda dastlabki aralashmadagi kristalgidratlar teng mol miqdorda bo`lganligi ma`lum bo`lsa, dastlabki aralashma massasini (g) aniqlang.

A) 62,25 B) 70 C) 87,5 D) 75

3. Tarkibida 36% suvi bo`lgan MeSO<sub>4 *</sub> nH<sub>2</sub>O kristalgidrat va CaCl<sub>2 *</sub> 6H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi, 138.6 ml suv saqlagan eritma olindi. Agar eritmadagi kalsiy xloridning massa ulushi metal sulfatning massa ulushidan 4,9% ga kamligi hamda dastlabki aralashmadagi kristalgidratlar teng mol miqdorda bo`lganligi ma`lum bo`lsa, hosil bo`lgan eritmaning massasini (g) toping?

A) 150 B) 200 C) 225 D) 265

4. Tarkibida 68,97% tuzi bo`lgan Me<sub>2</sub>(SO<sub>4</sub>)<sub>3 *</sub> nH<sub>2</sub>O kristalgidrat va Na<sub>2</sub>SO<sub>4 *</sub> 7H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi 95,8 ml suv saqlagan eritma olindi. Agar eritmadagi Me₂(SO₄)₃ ning massa ulushi natriy sulfatning massa ulushidan 17,2% ga ko`pligi hamda dastlabki aralashmadagi kristalgidratlar teng mol miqdorda bo`lganligi ma`lum bo`lsa, hosil bo`lgan eritmadagi SO^-₄ anionni massa ulushini (%) toping?

A) 25,6 B) 27,8 C) 22,2 D) 28,89

5. Tarkibida 21,6% suvi bo`lgan Me<sub>2</sub>(SO<sub>4</sub>)<sub>3 *</sub> nH<sub>2</sub>O kristalgidrat va Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3 *</sub> 5H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi 131,2 ml suv saqlagan eritma olindi. Agar eritmadagi temir(III)sulfatning massa ulushi Me₂(SO₄)₃ ning massa ulushidan 0,48% ga ko`pligi hamda dastlabki aralashmadagi moddalar teng mol miqdordagi ma`lum bo`lsa, aralashmaga qo`shilgan suv massasini (g) toping?

A) 112,5 B) 92,5 C) 85,6 D) 101,5

6. Tarkibida 18,367% suvi bo`lgan Me<sub>2</sub>(SO<sub>4</sub>)<sub>3 *</sub> nH<sub>2</sub>O kristalgidrat va CuSO<sub>4 *</sub> 5H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi, 78 ml suv saqlagan eritma olindi. Agar eritmadagi Me₂(SO₄)₃ ning massa ulushi mis sulfatning massa ulushidan 5,333% ko`pligi va dastlabki kristalgidratlar mol nisbati mos ravishda 1:2 ma`lum bo`lsa, dastlabki aralashmadagi noma`lum metalni massa ulushini (%) toping?

A) 8,89 B) 14,54 C) 11,31 D) 16,56

7. Tarkibida 64% tuzi bo`lgan ASO<sub>4 *</sub> nH<sub>2</sub>O kristalgidrat va tarkibida 39,344% suvi bo`lgan BCl_{2 *} 4H₂O dan iborat aralashma ma`lum hajm suvda eritildi, 95,8 ml suv saqlangan eritma olindi. Agar eritmadagi ASO<sub>4</sub> ning massa ulushi BCl<sub>2</sub> ning massa ulushidan 6,533% ga ko`pligi va dastlabki kristalgidratlar teng mol miqdordaligi ma`lum bo`lsa, hosil bo`lgan eritmadagi BCl₂ ning massa ulushini (%) toping?

A) 16,5 B) 12,4 C) 14,8 D) 10,6

8. Tarkibida 32,727% suvi bo`lgan MeSO<sub>4 *</sub> nH<sub>2</sub>O va FeSO<sub>4 *</sub> 6H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi. 105,2 ml suv saqlangan eritma olindi. Agar eritmadagi MeSO₄ ning massa ulushi temir(II) sulfatning massa ulushidan 9,6% ga ko`pligi va kristalgidratlar mol nisbati mos ravishda 2:1 ma`lum bo`lsa, FeSO_{4 *} 6H₂O ning massasini (g) toping?

A) 26 B) 24 C) 22,8 D) 20,7

9. Tarkibida 41,538% suvi bo`lgan MeSO<sub>4 *</sub> nH<sub>2</sub>O va CrSO<sub>4 *</sub> 4H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi, 110,4 ml suv saqlagan eritma olindi. Agar eritmadagi

MeSO_{4 *} nH₂O ning massa ulushi xrom (II) sulfatning massa ulushidan 14,4% ga kamligi va kristalgidratlar mol nisbati mos ravishda 1:2 ma`lum bo`lsa, hosil bo`lgan eritma massasini (g) toping?
A) 100 B) 150 C)250 D) 200

10. Tarkibida 24% suvi bo`lgan Me<sub>2</sub>(SO<sub>4</sub>)<sub>3 *</sub> nH<sub>2</sub>O kristalgidrat va Me<sub>2</sub>SO<sub>4 *</sub> 6H<sub>2</sub>O dan iborat aralashma ma`lum hajm suvda eritildi, 151,6 ml suv saqlagan eritma olindi. Agar eritmadagi natriy sulfatning massa ulushi noma`lum sulfat tuzining massa ulushidan 10% ga kamligi hamda dastlabki aralashmadagi kristalgidratlar teng mol miqdorda bo`lganligi ma`lum bo`lsa, dastlabki aralashma massasini (g) aniqlang?

A) 35 B) 70 C) 105 D) 140