A cation exchange resin RH2 can replace Ca2+ in hard water as RH2+Ca2+ – InterviewSolution

1.	A cation exchange resin RH2 can replace Ca2+ in hard water as RH2+Ca2+→RCa+2H+. 1 L of hard water (hardness x ppm) after passing through RH2 has pH=2. Then value of x40 is:
Answer» A cation exchange resin $R H_{2}$ can replace $C a^{2 +}$ in hard water as $R H_{2} + C a^{2 +} \to R C a + 2 H^{+}$ . $1 L$ of hard water (hardness $x p p m$ ) after passing through $R H_{2}$ has $p H = 2$ . Then value of $\frac{x}{40}$ is:

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