Admin Table of Contents
- 1 What is a chemical reaction between an acid and a base that takes place in a water solution?
- 2 What are solutions containing ions that react with acids or bases to minimize their effects?
- 3 Which changes colour in acids and bases?
- 4 What is a substance that changes color in the presence of an acid or base?
- 5 What does the color change in titration mean?
What is a chemical reaction between an acid and a base that takes place in a water solution?
Ch. 23 Acids, Bases, and Salts
| A | B |
|---|---|
| neutralization | chemical reaction between an acid and a base that takes place in a water solution. |
| salt | is a compound formed when the negative ions form an acid combine with the positive ions from a base |
Is an organic compound that changes color in acid and base?
An indicator is a large organic molecule that works somewhat like a ” color dye”. Whereas most dyes do not change color with the amount of acid or base present, there are many molecules, known as acid – base indicators , which do respond to a change in the hydrogen ion concentration.
What is the name of an organic salt with nonpolar ends?
Physical Science Chap. 23 Acids, Bases, and Salts
| A | B |
|---|---|
| titration | process in which a solution of known concentration is used to determine the concentration of another solution |
| soap | organic salts with nonpolar, hydrocarbon ends that interact with oils and dirt and polar ends that helps them dissolve in water |
What are solutions containing ions that react with acids or bases to minimize their effects?
Buffers are solutions that contain a weak acid and its a conjugate base; as such, they can absorb excess H+ ions or OH– ions, thereby maintaining an overall steady pH in the solution.
Is the reaction between an acid and base?
The reaction of an acid with a base is called a neutralization reaction. The products of this reaction are a salt and water.
Which changes color in acids and bases?
An indicator is a substance which changes its color in the presence of acid or base. It is indicative of acid and base in the solution. An indicator is used in chemical laboratory. An indicator is used in the titration process of the solutions to indicate the completion of the acid-base related reactions.
Which changes colour in acids and bases?
Acids cause universal indicator solution to change from green toward red. Bases cause universal indicator to change from green toward purple. Water molecules (H2O) can interact with one another to form H3O+ ions and OH− ions.
What changes color in the presence of an acid or a base?
chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
Which reaction is an example of an acid-base reaction?
In most acid-base reactions, there will always be water and the salts. For example, hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to form sodium chloride (NaCl) salt and water (H2O).
What is a substance that changes color in the presence of an acid or base?
Indicators are substances whose solutions change color due to changes in pH. These are called acid-base indicators.
What causes the color of a solution to change?
Whether a solution is acidic or basic can be measured on the pH scale. When universal indicator is added to a solution, the color change can indicate the approximate pH of the solution. Acids cause universal indicator solution to change from green toward red. Bases cause universal indicator to change from green toward purple.
Is the green indicator left in the Cup acidic or basic?
The green indicator left in the cup is neither acidic nor basic, so it must be neutral. Introduce the acid and base used in the demonstration and discuss how the color of universal indicator may change with other common acids and bases.
What does the color change in titration mean?
The indicator changes to pink because the phenolphthalein is ionized in basic solution. The base strips H+ ions from the acid, and near the end of the titration, it starts pulling H+ ions from the phenolphthalein. Phenolphthalein is a unique molecule. When the H+ is stripped off, it changes color from clear to pink.
What causes universal indicator solution to change from green to red?
Acids cause universal indicator solution to change from green toward red. Bases cause universal indicator to change from green toward purple. Water molecules (H 2O) can interact with one another to form H 3O + ions and OH − ions. At a pH of 7, there are equal numbers of H 3O + ions and OH − ions in water, and this is called a neutral solution.