The particles of matter have interstitial spaces between themKeywords (English): matter particles – intermolecular spaces – physical states – particle motion

Keywords: Chemical change – Reaction – Reactants – Products – Evidence

the goal:Explanation of how we can infer a chemical change has occurred.Materials and tools:Ammonia solution - Distilled water - Glass beaker - Universal indicator - Effervescent tablets.Steps:1- Put a quantity of distilled water in the glass.2- Add drops of ammonia solution into the water in the gl......

Keywords: Mixing substances – Separating a mixture of liquids (water and oil) – Separating a mixture of solid and liquid – Separating a mixture of solids

Keywords: Acids – Bases – Indicators – pH – Color

Objective: To identify the difference between hydrated and anhydrous salts and to explain the effect of adding water and heating on some salts.Materials: Anhydrous copper sulfate (CuSO₄) – Anhydrous cobalt chloride (CoCl₂) – Distilled water – Dropper – Test tubes – Heat source (Bunsen burner or elec......

Objective: Identify the properties of amphoteric oxides.Materials: Test tubes – test tube holder – spoons – aluminum oxide powder (Al₂O₃) – zinc oxide powder (ZnO) – diluted hydrochloric acid (HCl) – diluted sulfuric acid (H₂SO₄) – diluted sodium hydroxide (NaOH) – small burner – dropper.Procedure:......

Keywords: Pure water – Neutral – pH 7 – Indicators – Acids and bases

purpose of experiment illustrate chemical indicators tools Hydrochloric acid – sodium hydroxide – orange methyl indicator – litmus indicator – bromothymol blue indicator – 12 conical flask – distilled water-Phenolphthalein indicator StepsPut 10 ml of the solution in front of you into each conical......

Keywords: pH – Litmus paper – Solutions – Acidic – Basic

Keywords: Metals – Acids – Hydrogen – Chemical reaction

Formation of SaltKeywords (English): salt formation – ionic reaction – crystallization

Keywords: Hydrated salts – Water molecules – Heating – Chemical formula

Keywords: Rock dissolution – Acids – Reaction – Carbonates – Carbon dioxide

Keywords: Acid strength – Strong acids – Weak acids – Ionization – pH

Keywords: Metals – Acids – Hydrogen – Chemical reaction

Electrical Conductivity of AcidsKeywords (English): electrical conductivity – acids – ions – electrolyte – electric current

Keywords: Red cabbage – Color indicator – pH – Acids – Bases