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S2_SCI_9.4.1 _Effect of acid on metals

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S2_SCI_9.3.1_pH change in neutralization

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S2_SCI_9.2c_ph value_universal indicator

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S2_SCI_9.4.2 _ Effect of acid on building materials

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S2_SCI_9.1c_handling acids and alkalis safely

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S2_SCI_9.5 _Potential hazards related to the use of acids and alkalis

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