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The scheme below shows some reaction sequence starting with solid M. a) Name solid M
Chemistry
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Ili kutambua 'Solid M', tunachambua mchoro wa mmenyuko hatua kwa hatua:
- **Solid M humenyuka na }$ ili kutengeneza 'Solid N'.
- 'Solid N' hutoa gesi ambayo huwaka kwa sauti ya 'pop'. Hii ni sifa ya gesi ya hidrojeni (). Gesi hii hutolewa wakati metali tendaji humenyuka na asidi.
- 'Solid N' humenyuka na matone machache ya (ammonia ya maji) kutengeneza 'White ppt' (mchanga mweupe).
- 'White ppt' humenyuka na ya ziada kutengeneza 'Colourless Solution Q' (suluhisho isiyo na rangi).
Kutokana na dalili hizi:
- Gesi inayowaka kwa 'pop' inaashiria hidrojeni (). Hii inamaanisha 'Solid M' ni metali inayoweza kumenyuka na asidi ya sulfuriki kutoa hidrojeni.
- Mchanga mweupe unaotengenezwa na unaonyesha uwepo wa ioni za metali kama vile , , , au .
- Mchanga mweupe unaoyeyuka katika ya ziada na kutengeneza suluhisho isiyo na rangi ni dalili muhimu sana. Kati ya ioni za metali zilizotajwa, ni ioni za zinki () pekee ndizo huunda mchanga mweupe wa hidroksidi ya zinki () ambao huyeyuka katika amonia ya maji ya ziada na kutengeneza suluhisho isiyo na rangi (ioni ya tetraamminezinc(II), ). Ioni zingine kama , , na huunda mchanga mweupe lakini hauyeyuki katika amonia ya maji ya ziada.
Kwa hiyo, 'Solid N' lazima iwe chumvi ya zinki, na kwa kuwa imetengenezwa na asidi ya sulfuriki, 'Solid N' ni sulfati ya zinki ().
Hii inamaanisha 'Solid M' ni metali ya zinki ().
Mmenyuko ni kama ifuatavyo:
- Hapa, 'Solid M' ni zinki, 'Solid N' ni sulfati ya zinki (katika suluhisho), na gesi ya hidrojeni hutolewa.
- Hapa, mchanga mweupe wa hidroksidi ya zinki () hutengenezwa.
- Mchanga mweupe huyeyuka na kutengeneza suluhisho isiyo na rangi (Solution Q).
Kwa hivyo, 'Solid M' ni zinki.
a) Jina la 'Solid M' ni:
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