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25mL samples of distiled water, tap wate...

`25mL` samples of distiled water, tap water and boiled water required, respectively, `1mL, 13mL` and `5mL` of soap solution to form a permanent lather. The ratio of temporary to permanent hardness in the tap water is

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25 mL sample of distilled water, tap water and boiled water required, respectively, 1 mL,13 mL and 5 mL of soap solution to form permanent lather. The ratio of permanent to temprorary hardness in the tap water is

100 mL sample of distilled water, tap water and boiled water required, respectively, 2 mL,17 mL and 7 mL of soap solution to form permanent lather. The ratio of permanent to temprorary hardness in the tap water is

What causes the temporary and permanent hardness of water?

What causes the temporary and permanent hardness of water ?

What causes the temporary and permanent hardness of water?

What causes the temporary and permanent hardness of water?

What causes the temporary and permanent hardness of water ?

What causes the temporary and permanent hardness of water?

Both temporary and permanent hardness in water are removed by :