A concentrated acid is an acid which is in either pure form or has a high concentration. Laboratory type sulfuric acid (about 98% by weight) is a concentrated (and strong) acid. A dilute acid is that in which the concentration of the water mixed in the acid is higher than the concentration of the acid itself.
Concentrated HCl means it contains more HCl whereas dilute HCl contains less acid and more water. Hence, concentrated HCl is more acidic than dilute HCl. The more acidic, the less is the pH and vice versa. Hence, dilute HCl has higher pH than concentrated HCl.
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A concentrated acid is an acid which is in either pure form or has a high concentration. Laboratory type sulfuric acid (about 98% by weight) is a concentrated (and strong) acid. A dilute acid is that in which the concentration of the water mixed in the acid is higher than the concentration of the acid itself.
Explanation:
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Concentrated HCl means it contains more HCl whereas dilute HCl contains less acid and more water. Hence, concentrated HCl is more acidic than dilute HCl. The more acidic, the less is the pH and vice versa. Hence, dilute HCl has higher pH than concentrated HCl.