A sample of water has ppm of . Its hardness in terms of is: — Redox Reactions and Volumetric Analysis Chemistry Question
Question
A sample of water has $10$ ppm of $MgSO_4$. Its hardness in terms of $CaCO_3$ is:
Answer: A
💡 Solution & Explanation
Molecular weight $MgSO_4 = 120$, $CaCO_3 = 100$. <br>Hardness = $(\text{mass of salt} / \text{Mw of salt}) \times \text{Mw of } CaCO_3$. <br>Hardness = $(10 / 120) \times 100 = 100/12 = 8.33$ ppm. [9, 10]
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes