# What was used in the first voltaic cell to allow for ion flow between the solutions of CuSO4 and ZnSO4? A. a porous barrier B. a non-porous barrier C. a platinum bridge D. a salt bridge

###### Question:

What was used in the first voltaic cell to allow for ion flow between the solutions of CuSO4 and ZnSO4?
A. a porous barrier
B. a non-porous barrier
C. a platinum bridge
D. a salt bridge

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