The balanced chemical equation for acid-base reactions is as given below
2HCl(aq) + Ca(OH)2 ------ CaCl2 + 2H2O
What is balanced chemical equation?A chemical equation is said to be balanced chemical equation if the atoms or molecules of different elements on the reactant side is equal to the atoms or molecules of different elements on the product side.
In the given reaction, HCl is reactant and Ca(OH)2 is base. They react with each other to form CaCl2 and release two molecules of H2O.
Now, we will balance the chemical equation.
On reactant side, there are 3 atoms of hydrogen atoms, one atom of chlorine, two atom of oxygen and one calcium atom. So, we equal it by reacting two molecules of HCl with one molecule of Ca(OH)2 to form one molecule of CaCl2 and two molecules of water.
Therefore, by balancing equation we get
2HCl(aq)+Ca(OH)2 ------ CaCl2 + 2H2O
Thus, we concluded that the balanced chemical equation for acid-base reactions is as given below:
2HCl(aq) + Ca(OH)2 ------ CaCl2 + 2H2O
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Is CO2 polar or nonpolar covalent bond?
Due to its symmetry and the fact that the pull of the two oxygen atoms on the electrons of carbon cancel each other out, carbon dioxide is a nonpolar molecule with polar bonds. Because the vector sum of the dipole moments of the two CO bonds is zero, the CO2 molecule is non-polar even if the CO bond in it is polar.
With carbon, each oxygen atom forms a double bond. Different electronegativities of carbon (C) and oxygen (O) result in unequal distribution of electrons between them. Due to the cancellation of the two bond dipole moments, there is no net molecule dipole moment. Carbon dioxide is a non-polar gas as a result.
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If my independent variable is temperature of butter, how can I specify my dependent variable to be more specific? My dependent variable is texture of cookies.
Answer: The hot dissolved butter will form softer cookies.
Explanation:
1) A potassium carbonate hydrate has a formula K2CO3.XH2O. 10g of the hydrate leave 7.83g of anhydrous salt upon heating. Deduce the formula of the hydrate.
2) Samples of carbon of masses 3.62g , 5.91g , and 7.07g undergo combustion in excess air. The masses of carbon dioxide (the unique product of the combustion in each case) obtained are respectively 13.26g, 21.66g, and 25.91g. Does carbon dioxide have a fixed composition? Determine it!
The formula of the hydrated potassium carbonate salt is K₂CO₃.2H₂O
Based on the calculated mass ratio of carbon and oxygen in carbon dioxide, carbon has a fixed composition.
What are hydrated compounds?Hydrated compounds are compounds that contain one or more molecules of water physically combined with a molecule of the compound.
The formula of the hydrated potassium carbonate salt is determined as follows:
Mass of the hydrated sample = 10.0 g
Mass of anhydrous salt = 7.83
mass of water = 10 - 7.83
mass of water = 2.17 g
Molar mass of water = 18.0 g
Molar mass of anhydrous potassium carbonate = 138 g
moles of anhydrous potassium carbonate in sample = 7.83/138
moles of anhydrous potassium carbonate = 0.056 moles
moles of water in the hydrated salt = 2.17/18
moles of water in the hydrated salt = 0.12
Mole ratio of water to anhydrous salt = 0.12/0.056
Mole ratio of water to anhydrous salt = 1 : 2
Formula of hydrated salt = K₂CO₃.2H₂O
The mass ratio of carbon to oxygen in the compounds is given below:
Sample 1:
Mass ratio = 3.62 / (13.26 - 3.62)
Mass ratio = 0.38 : 1
Sample 2:
Mass ratio = 5.91 / (21.66 - 5.91)
Mass ratio = 0.38 : 1
Sample 3:
Mass ratio = 7.07 / (25.91 - 7.07)
Mass ratio = 0.38 : 1
Carbon has a fixed composition.
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Calculate the pH of a solution that has a hydronium ion concentration, [H3O+], of 4.75×10−8 M.
pH= ?
Answer:
pH=7.32
Explanation:
pH is a mathematical expression that represents -log base 10 of the hydronium concentration:
[tex]pH=-\log[H_3O]\\pH=-log(4.75x10^-8)\\pH=7.32[/tex]
How does the generator work? Select the statement that describes that.
It turns electrical energy into KE.
This is the correct statement of how a generator works:
What is generator?A generator is described as a device that converts motive power or fuel-based power into electric power for use in an external circuit.
Generators contrary to general opinion do not create electricity instead it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit. This flow of electrons makes up the output electric current supplied by the generator.
The present-day generators work on the principle of electromagnetic induction that was discovered by Michael Faraday.
Faraday realized that the above flow of current can be created by moving an electrical conductor in a magnetic field and this movement creates a voltage difference between the two ends of the conductor which causes the electric charges to flow, hence generating electric current.
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Complete question:
How does the generator work? Select the statement that describes that.
______It turns electrical energy into KE.
_____ It turns sound energy into electrical energy.
_____ It turns electrical energy into sound energy.
_____ It turns electrical energy into thermal energy.
_____ It turns KE into electrical energy.
Does iodine and oxygen form an ionic compound?
Both oxygen and iodine are non-metals. Neither contributes electrons to achieve octet stability. Instead of forming an ionic bond, these two electrons are shared to form a covalent bond.
If these two compounds react to form a compound, that compound is considered an ionic compound. The ionic form of rubidium is Rb+, while the ionic form of sulfur is S2-. Sodium reacts with oxygen to form ionic compounds.
On the other hand, sodium chloride contains ions. It is an ionic compound. Ionic compounds contain ions that are held together by attractive forces between oppositely charged ions. Table salt is one of the best-known ionic compounds. Rubidium is a positive element. It actively donates its single valence electron to form a positively charged cation.
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What group reacts with chlorine in a 1/2 ratio?
Answer:sulphur reacts with chlorine in 1:2
Explanation:hope this helps :)
what are neutral atoms on the periodic table
Neutral atom generally means to atoms which don't react with any other atoms or elements.
If an atom has an equal number of electrons and protons, then it also has an equal number of negative (the electrons) and positive electric charges (the protons). As a result, the total electric charge of the atom is zero, and the atom is said to be neutral. Thus, all the elements in the periodic table are neutral atoms.
Example of neutral atom
For example a neutral sodium atom which contains 11 protons and 11 electrons. And after removing an electron from this atom we get a positively charged Na⁺ ion that has a net charge of +1. Atoms become negatively charged when it gains extra electrons.
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what is lithification
lithification is a complex process where sediments are compact under pressure, expel connate fluids and converted into solid rock.
What are Rock?A rock is the collection of solid (grains) mineral materials that grow or become cemented together. it can be a natural substance composed of solid crystals of different minerals that have been blend together into a solid lump.
Types of Rocks?The major types of rocks are:
Igneous rocks: also known as fire ( Latin ) are form when hot, molten rock (magma) crystallizes and solidifies. The melt substance originates deep within the Earth.sedimentary: sedimentary rocks are generally formed from pre-existing rocks or remains of once-living organisms. They are also form from deposits that accumulate on the Earth's surface. It is observed that sedimentary rocks often have distinctive layering or bedding.metamorphic: this type of rock is also referred as changed rocks, it occurs when solid rock changes in composition and/or texture without the mineral crystals melting. The changes is as a result of the subject to high heat, high pressure, hot mineral-rich fluids.learn more about Rocks here:
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What is the bond between phosphorus and chlorine?
Phosphorus and chlorine form bond is covalent bond.
A covalent bond is likely to form if the difference in electronegativity between the elements is less than 1.7.
For instance, the electronegativity of phosphorus (P) is 2.1 and that of chlorine (Cl) is 3.0.
These two numbers are differentiated by 0.9. Since 0.9 is lesser than 1.7, phosphorus and chlorine form a covalent bond.
Chlorine and phosphorus are both found on the right side of the periodic table, which is where nonmetals are. As a result, a covalent bond will be formed between the two nonmetals.
So, we can say that covalent bond is between phosphorus and chlorine.
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