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Combining which solutions would produce a color change? — Descriptive Chemistry Chemistry Question

Question

Combining which solutions would produce a color change?

A.

NaCl(aq) and Br2(aq)

B.

Na2CO3(aq) and HNO3(aq)

C.

K2C2O4(aq) and FeCl3(aq)

✓ Correct
D.

CH3COOH(aq) and Co(NO3)2(aq)

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