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It is important because even if you believe your new product idea is a guaranteed winner, testing the market before you launch can help you tweak what you’re selling or how you’re selling it, helping you maximize your profits. Product marketing tests let you evaluate multiple aspects of your business strategy before you commit your entire budget.
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The anions that can act as bases (conjugate bases of weak acids) have the capability to hydrolyse water and produce OH− ions. Cl−, Br−NO−3, SO2−4 are all conjugate bases of strong acids that don't have the capability to hydrolyse water and so they aren't basic.
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