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M.A.R.
M.A.R.
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Your last guess is exact. This is a classical method, the equivalent point is seen by our eyes, so in our interest is for the complex to be formed so we can recognize the colour, and we should add NH3$\ce{NH3}$ so the colour won't change immediately after the equivalent point.

Your last guess is exact. This is a classical method, the equivalent point is seen by our eyes, so in our interest is for the complex to be formed so we can recognize the colour, and we should add NH3 so the colour won't change immediately after the equivalent point.

Your last guess is exact. This is a classical method, the equivalent point is seen by our eyes, so in our interest is for the complex to be formed so we can recognize the colour, and we should add $\ce{NH3}$ so the colour won't change immediately after the equivalent point.

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Ndrina Limani
Ndrina Limani
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Your last guess is exact. This is a classical method, the equivalent point is seen by our eyes, so in our interest is for the complex to be formed so we can recognize the colour, and we should add NH3 so the colour won't change immediately after the equivalent point.