Given curve d/dx (1/5x - 3) , find
i)the point of intersection of the curve with the y-axis
ii)tangent gradient at point (1, -1)
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Step-by-step explanation:
(i) Silver goes into the complex, and then it is displaced with zinc.
AgCl+2NaCN→NaCl+Na[Ag(CN)
2
]
2Na[Ag(CN)]
2
+Zn→Na
2
[Zn(CN)
4
]+2Ag↓
(ii) Yellow precipitate is formed.
KNO
2
+CH
3
COOH→CH
3
COOK+HNO
2
CoCl
2
+2KNO
2
→Co(NO
2
)
2
+2KCl
Co(NO
2
)
2
+2HNO
2
→Co(NO
2
)
3
+NO+H
2
O
Co(NO
2
)
3
+3KNO
2
→K
3
[Co(NO
2
)
6
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