How is the Concentration of Hydroxide Ions (OH−) Affected When Excess Base is Dissolved in a Solution of Sodium Hydroxide? - Science


How is the concentration of hydroxide ions (OH) affected when excess base is dissolved in a solution of sodium hydroxide?



The concentration of hydroxide ions (OH) would increase when excess base is dissolved in a solution of sodium hydroxide.

  Is there an error in this question or solution?
Chapter 2: Acids, Bases and Salts - Intext Questions [Page 25]


NCERT Science Class 10
Chapter 2 Acids, Bases and Salts
Intext Questions | Q 6 | Page 25

Video TutorialsVIEW ALL [2]


Dilute NaOH can be tested with
(a) red litmus paper
(b) blue litmus paper
(c) lime water
(d) Na2CO3

  Column A   Column B
i eosin 1 losing hydrogen
ii oxidation 2 synthetic indicator
    3 losing oxygen
    4 natural indicator


When phenolphthalein is added to NaOH, the colour of the solution will become _________.

  1. colourless
  2. red
  3. pink
  4. yellow

From which plant is litmus paper or litmus solution obtained?

  1. Moss
  2. Rose
  3. Hibiscus
  4. Lichen

What do we observe on pouring acetic acid on red and blue litmus papers?

(A) Red litmus remains red and blue litmus turns red.

(B) Red litmus turns blue and blue litmus remains blue.

(C) Red litmus turns blue and blue litmus turns red.

(D) Red litmus becomes colourless and blue litmus remains blue.

When acids react with metal, which gas is liberated?

Write word equations and then balanced equations for the reaction taking place when:

Dilute hydrochloric acid reacts with iron filings.

The litmus paper or the litmus solution is obtained from ________ plant

(A) Moss

(B) Lichen

(C) Rose

(D) Hibiscus

What happens when an acid reacts with a metal?

What happens when an acid reacts with a metal hydrogencarbonate? Write equation of the reaction which takes place.

Name the gas evolved when zinc granules are treated/heated with:

hydrochloric acid solution

Complete and balance the following chemical equations:

`Ca(OH)_2 + Cl_2 ->`

Phenolphthalein is a synthetic type of indicator.

Choose the correct alternative and rewrite the following sentence.

Phenolphthalein is ___________ type of indicator. 

When _______________ is passed through fresh lime water, it turns milky.

Answer the following question:
What is the universal indicator? Does Mg (OH)2 react with sodium hydroxide? If not, why?

Magnesium hydroxides are used for treating _______

Write any four physical properties of acids.

Acids turn blue litmus paper to ______.

What is a neutralization reaction? Give an example.

Which of the following statements is not correct?

Which of the following are present in a dilute aqueous solution of hydrochloric acid?

Acids present in fruits and vegetables are called ______ acids.

Vinegar is ______ in taste.

A salt may be ______.

Solutions of acids conduct ______.

______ change the colour of the indicators.

Can we taste acids and bases to identify them?

Copper or brass cooking vessels are coated with tin metal. Why?

Take a clean test tube with a holder and pour some dilute hydrochloric acid. Add a few pieces of magnesium ribbon pieces slowly. What do you observe? Now show a burning match stick near the mouth of the test tube. Do you hear any sound? The gas burns with a pop sound. From this, it is observed that hydrogen gas has been formed due to the reaction between acid and metal.

What is the correct procedure for mixing acid and water? Why?

“All acids contain one or more hydrogen atoms, but not all substances containing hydrogen are acids.” Support this statement with examples.

______ & ______ metals do not react with HCl or HNO3.

The formula of bleaching powder is  ______.

The taste of acid is ______.

Write notes on the properties of acids.

Two salts 'X' and 'Y' are dissolved in water separately. When phenolphthalein is added to these two solutions, the solution 'X' turns pink and the solution 'Y' does not show any change in colour, therefore 'X' and 'Y' are:

The metal that will not produce hydrogen gas when reacted with dilute acids.


      Forgot password?
Use app×