Answer:
A Calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.
Explanation:
Ex- when an exothermic reaction ( accompanied by or requiring absorption of heat)occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution increasing its temperature.
- When an endothermic reaction (Heat evolving reaction) occurs, the heat required is absorbed from the thermal energy of the solution, decreasing its temperature.
A burning piece of coal which is releasing heat due to its combustion and is transferred to water.
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Atomic size decreases along a period because of the nuclear charge increasing, this means that the electrons are more attracted to the nucleus, which decreases the size.
Atomic size increases down a group because the number of electron shells is greater each time, meaning that the electrons are less attracted to the nucleus.
The consumption of antacid affect urine pH by increasing the pH of urine. Sodium bicarbonate or antacid neutralizes the acidity in the stomach. It is expelled in the body through the urine by alkalizing it. Hope this answers the question.
Solution :
It is given that dilute hydrochloric acid is titrated with sodium carbonate solution.
of a 0.100
of hydrocholric acid is used.
Thus, 10 mL of the 0.1 molar dilute hydrochloric acid is titrated with 16.2 mL of Sodium carbonate solution.
The equation would be :
Now we know that that the
Molarity = ![$\frac{n}{v} \times 100$](https://tex.z-dn.net/?f=%24%5Cfrac%7Bn%7D%7Bv%7D%20%5Ctimes%20100%24)
For hydrochloric acid solution,
![$0.1=\frac{n}{10} \times 100$](https://tex.z-dn.net/?f=%240.1%3D%5Cfrac%7Bn%7D%7B10%7D%20%5Ctimes%20100%24)
∴ n = 0.01 moles.
Now for one mole of
, two moles of HCl acid is used.
For one mole of HCl, one-half mole of
is required.
Therefore, for 0.01 mole of HCl, we require 0.005 mole of
.
Hence, 0.01 mole of hydrochloric acid and 0.005 mole of
solution is used.
The color turns red when methyl orange indicator is used in HCl acid.
Answer:
The answer is covalent bond
Explanation:
when oxygen atom and two hydrogen atoms are combined, water molecule is formed according to the equation;
2H2 + O2 ==> 2H2O
Water is a covalent compound.
A covalent bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
For many molecules, the sharing of electrons allows each atom to attain the equivalent of a full outer shell, corresponding to a stable electronic configuration.