Скачать с ютуб Chemical indicator and salts | Prep.1 | Unit 1 - Lesson 3 | Science в хорошем качестве

Chemical indicator and salts | Prep.1 | Unit 1 - Lesson 3 | Science

شرح ساينس الصف الأول الاعدادي لغات - الفصل الدراسي الثاني شرح ساينس الاول الاعدادي - ترم تاني لينك تحميل الملزمة https://drive.google.com/file/d/1aZ8l... لينك تليجرام https://t.me/mrahmedelbashagroup In This Part : Indicators Are chemical substances whose color differs in acidic medium from that in alkaline medium. Examples of chemical indicators include 1. Litmus indicator The litmus indicator is used in the composition of litmus strips, which its color change according to the type of medium, as follows: Universal indicator An indicator that can differentiate between acids and alkalis or between different acids or different alkalis based on their strength. Potential of hydrogen pH A scale ranging between the values O to 14, used to determine the acidity and the basicity of solutions. pH meter device This device determines the pH value of any solution directly and accurately, as the pH value is displayed immediately on the device's digital screen Universal indicator strips These provide an approximate measuring of the pH values of the solutions, where the colour of the strip, (after being dipped in the solution) is compared to the indicator scale provided with the box, where each colour represents a definite pH value بالتوفيق مستر احمد الباشا