0
A chemical reaction yields 3 moles of lithium hydroxide LiOH How many grams of lithium hydroxide are present?
Remember the general moles equation.
moles = mass(g) / Mr
NB 'Mr' means the relative molecular mass.
The Mr for LiOH can be calculated from the Periodic Table using Atomic masses.
Atomic Mass (Li = 7 )
Atomic mass (O = 16)
Atomic mass (H = 1)
Add
7 + 16 + 1 = 24 (The Mr of LiOH)
Substituting in to the moles eq'n
3 = mass(g) / 24
Algebraically rearrange
mass(g) = 3 x 24
mass = 72 g
What else can I help you with?
What is the chemical composition of residue of ferric chloride and sodium hydroxide?
The residue from the reaction between ferric chloride and sodium hydroxide would likely contain iron hydroxide as a major component, with sodium chloride also present because of the initial reactants. The specific composition would depend on the stoichiometry of the reaction and any other impurities present in the starting materials.
What are the spectator ions in the neutralization of lithium hydroxide with hydrobromic acid?
Hi, the spectator ions are the ones that are still present (unchanged) at the end of the reaction, in this case its the hydrogen and hydroxyl ions (H+ and OH-) The reaction can be written to show these combined to ake a water molecule but that's only done for neatness. the reaction is better written as; (Li+) + (-Br) + (H+) + (-OH) ---> LiBr + (H+) + (-OH) or; Li+ + -Br ----> LiBr Hope this helps, Mike.
What Ion is always present in Alkali's?
The hydroxide ion (OH-) is always present in alkalis. Alkalis are chemical compounds that produce hydroxide ions in solution and have a pH greater than 7.
What is a chemical reactants and the products in the reaction?
Substances initially present in a chemical reaction that are consumed during the reaction or a substance that participates in a chemical reaction, esp a substance that is present at the start of the reaction while the end product of some chemical reactions yield products.
What are the products in a chemical reaction apex?
Products in a chemical reaction are the substances that are formed as a result of the reaction taking place. They are the end result of the chemical reaction and are typically different from the reactants that were originally present.
Which chemical property of lithium will be shown by the universal indicator?
The chemical property of lithium that will be shown by the universal indicator is its ability to be an alkali metal. When lithium reacts with water, it forms lithium hydroxide, which is a strong base. This reaction will cause the universal indicator to turn blue or purple, indicating a basic pH.
What is present after a chemical reaction?
That depends on the chemicals present before the chemical reaction and sometimes the conditions under which the chemical reaction occurred.
What is the chemical composition of residue of ferric chloride and sodium hydroxide?
The residue from the reaction between ferric chloride and sodium hydroxide would likely contain iron hydroxide as a major component, with sodium chloride also present because of the initial reactants. The specific composition would depend on the stoichiometry of the reaction and any other impurities present in the starting materials.
What are the spectator ions in the neutralization of lithium hydroxide with hydrobromic acid?
Hi, the spectator ions are the ones that are still present (unchanged) at the end of the reaction, in this case its the hydrogen and hydroxyl ions (H+ and OH-) The reaction can be written to show these combined to ake a water molecule but that's only done for neatness. the reaction is better written as; (Li+) + (-Br) + (H+) + (-OH) ---> LiBr + (H+) + (-OH) or; Li+ + -Br ----> LiBr Hope this helps, Mike.
What is the chemical reaction of phenolphthalein and sodium hydroxide?
Phenolphthalein reacts with sodium hydroxide to form a pink color, indicating the presence of a base. The chemical reaction involves the deprotonation of phenolphthalein by hydroxide ions to form an ionized molecule with a pink hue.
Are the substances that present when a chemical reaction begins the products?
The substances that are present when a chemical reaction begins are reactants, at the end of the reaction they form products.
What Ion is always present in Alkali's?
The hydroxide ion (OH-) is always present in alkalis. Alkalis are chemical compounds that produce hydroxide ions in solution and have a pH greater than 7.
The substances present when a chemical reaction begins?
The substances that are present when a chemical reaction begins are reactants, at the end of the reaction they form products.
What is a chemical reactants and the products in the reaction?
Substances initially present in a chemical reaction that are consumed during the reaction or a substance that participates in a chemical reaction, esp a substance that is present at the start of the reaction while the end product of some chemical reactions yield products.
What is the substance present at the start of a reaction?
The substance present at the start of a chemical reaction is called a reactant. Reactants are the starting materials that undergo chemical changes to form products during a reaction.
Is it trueThe substance that are present when a chemical reaction begins are the products?
No: the substances present at the beginning of reaction are the reactants or reagents.
What is the products of a chemical reaction?
The products of a chemical reaction are the substances that are formed as a result of the reaction taking place. These products can be different compounds or elements from the reactants that were present before the reaction occurred.
