Chemistry, 29.03.2020 14:36 drewje12

Explain why there is an uncertainty in pH values that are measured using universal indicator.

Please help!!

Answers: 2

Show answers

Answers

The chemical properties of many solutions enable them to be divided into three categories - acidic, alkaline and neutral solutions.

The pH scale is used to measure acidity and alkalinity:

solutions with a pH less than 7 are acidic

solutions with a pH of 7 are neutral

solutions with a pH greater than 7 are alkaline

If universal indicator is added to a solution it changes to a colour that shows the pH of the solution. Universal indicator is a mixture of a variety of other indicators and can be used to measure the approximate pH of a solution. A more accurate value can be obtained using a pH probe.

A coloured pH scale, ranging from dark red at pH 0, orange at pH 3, green at pH 7, blue at pH 10 to dark purple at pH 14.

pH scale and universal indicator colours

Answer from: Nycin

The chemical properties of many solutions enable them to be divided into three categories - acidic, alkaline and neutral solutions.

The pH scale is used to measure acidity and alkalinity:

solutions with a pH less than 7 are acidic

solutions with a pH of 7 are neutral

solutions with a pH greater than 7 are alkaline

A coloured pH scale, ranging from dark red at pH 0, orange at pH 3, green at pH 7, blue at pH 10 to dark purple at pH 14.

pH scale and universal indicator colours

Answer from: Quest

each column of the table is called a group. elements in a group share similar properties. groups are read from top to bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o. 2. 3. 4. 5. 6. 7. 8. 9. 2. beryllium. 9.012. 4. sodium. 22.990. 11. 3. magnesium. 24.305. 12. potassium. 39.098. 19. 4. calcium. 40.078. 20. i guess i

Answer from: Quest

The answer is nitrogen-containing bases

Another question on Chemistry

Chemistry, 21.06.2019 22:00

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Answers: 1

Answer

Chemistry, 22.06.2019 05:30

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Answers: 2

Answer

Chemistry, 22.06.2019 06:30

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Answers: 1

Answer

Chemistry, 22.06.2019 10:00

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Answers: 1

Answer

You know the right answer?

Explain why there is an uncertainty in pH values that are measured using universal indicator.
<...