Download App

Equilibrium — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEquilibrium3 Marks
Question
The concentration of hydrogen ion in a sample of soft drink is $3.8 \times 10^{-3} \mathrm{M}$. what is its pH ?
✓

Answer

Given,
$[\text{H}^+]=3.8\times10^{-3}\text{M}$
$=-\log[\text{H}^+]$
$=-\log(3.8\times10^{-3})$
$=-\log3.8-\log10^{-3}$
$=-\log3.8+3$
$=-0.58+3$
$=2.42$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Equilibrium→Equilibrium — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

$BCl _3$ is trigonal planar while $AlCl _3$ is tetrahedral in dimeric state. Explain.
OR
$BCl _3$ exists as monomer whereas $AlCl _3$ is dimerised through halogen bridging. Give reason. Explain the structure of the dimer of $AlCl _3$ also.
→
What is conjugate base of $\mathrm{H}_2$ ? What happens when $\mathrm{Cl}_2$ reacts with $\mathrm{H}_2 \mathrm{O}$ ? What type of reaction it is? Explain.
→
Complete the following reactions:
  1. $\text{SO}_3+\text{D}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ \ }$
  2. $2\text{Na}+2\text{D}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ }$
  3. $\text{P}_2\text{O}_5+\text{D}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ \ }$
→
How many neutrons and protons are there in the following nuclei?
$\text{ }^{13}_{06}\text{C},\text{ }^{16}_{08}\text{O},\text{ }^{24}_{12}\text{Mg},\text{ }^{56}_{26}\text{Fe},\text{ }^{88}_{38}\text{Sr}$
→
Chlorophyll present in green leaves of plants absorbs light at $4.620 \times 10^{14}Hz$. Calculate the wavelength of radiation in nanometer. Which part of the electromagnetic spectrum does it belong to?
→
Balance the following equations by the oxidation number method.
$\text{I}_2+\text{S}_2\text{O}^{2-}_3\xrightarrow{ \ \ \ \ \ \ }\text{I}^-+\text{S}_4\text{O}^{2-}_6$
→
What is hybrid state of each carbon in:
  1. $\text{CH}_2=\text{C}=\text{CH}_2$
  2. $\ \ \ \ \ \ \ {\text{O}}\\\ \ \ \ \ \ \ \ \|\\\text{H}-\text{C}-\text{H}?$
→
Calculate:
  1. Mass in grams of 5.8mol of $N_2O.$
  2. Number of moles in 8.0g of $O_2.$
  3. Molar mass of 11.2L at STP weighs 8.5g.
→
The reaction, $\text{CO (g) + 3H}_2\text{ (g)}\rightleftharpoons\text{CH}_4\text{ (g) + }\text{H}_2\text{O (g)}$ is at equilibrium at 1300K in a 1L flask. It also contain 0.30 mol of $\mathrm{CO}, 0.10 \mathrm{~molof} \mathrm{~H}_2$ and 0.02 mol of $\mathrm{H}_2 \mathrm{O}$ and an unknown amount of $\mathrm{CH}_4$ in the flask. Determine the concentration of $\mathrm{CH}_4$ in the mixture. The equilibrium constant, $\mathrm{K}_{\mathrm{c}}$ for the reaction at the given temperature is 3.90 .
→
For an actual result of an observation to be 5; two students A and B reported their readings as follows:
 
Observation number
Average
1
2
Student A
4.95
4.93
4.94
Student B
4.94
5.05
4.995
Which of the students has made a more precise observation? Is his observation accurate too?
→