Αποτελέσματα Αναζήτησης
30 Σεπ 2020 · The pH scale shows how acidic or basic a chemical is in aqueous solution (mixed with water). The scale runs from 0 (most acidic) to 14 (most alkaline or basic), where 7 is neutral pH. Chemicals with pH values from 0 up to 7 are acids, those with a pH value of 7 are neutral, and those with pH values greater than 7 up to 14 are bases. Here is a ...
Φωτόδεντρο e-books - μάθημα ΧΗΜΕΙΑ (Α' Λυκείου - ΜΑΘΗΜΑΤΑ ΓΕΝΙΚΗΣ ΠΑΙΔΕΙΑΣ): Καρτέλα περιγραφής του μαθήματος και πρόσβασης στα βιβλία του μαθήματος, σε όλες τις ψηφιακές μορφές τους.
Να ορίζουν το pΗ, να ταξινομούν τα διαλύματα σε όξινα, βασικά και ουδέτερα και να υπολογίζουν το pΗ ενός ηλεκτρολυτικού διαλύματος. Να περιγράφουν την επίδραση κοινού ιόντος και τις συνέπειες που έχει στο βαθμό ιοντισμού ενός ηλεκτρολύτη. Να γνωρίζουν τι είναι ρυθμιστικά διαλύματα, τους τρόπους παρασκευής τους και τη δράση τους.
pH is a measure of how acidic or basic a substance is. It takes a numerical value between 0 and 14 that measures the relative amount of free hydrogen and hydroxyl ions in water. Water having more hydrogen ion concentration than hydroxyl is acidic.
For example, a pH of 3 is ten times more acidic than a pH of 4. Likewise, a pH of 3 is one hundred times more acidic than a pH of 5. Similarly a pH of 11 is ten times more basic than a pH of 10. Figure \(\PageIndex{1}\) depicts the pH scale with common solutions and where they are on the scale.
pH is a logarithmic scale. A solution that has a pH of 1.0 has 10 times the [H +] as a solution with a pH of 2.0, which in turn has 10 times the [H +] as a solution with a pH of 3.0 and so forth. Using the definition of pH, it is also possible to calculate [H +] (and [OH −]) from pH and vice versa.
12 Αυγ 2024 · This is known as the \(pH\) scale, t he range of value s from 0 to 14 that describes the acidity or basicity of a solution. You can use \(pH\) to make a quick determination whether a given aqueous solution is acidic, basic, or neutral.
