Because of high of heat of Hydration of HF ( Fluoride ion is extensively hydrated because of it's small size )
I think it is a positive charge!!
SINCE CARBONATE & HYDROXIDE'S ARE NEGATIVE ELEMENTS(eg..OH-) WHEN USED WITH ACIDIC (pH<7)ENVIRONMENT (i.e..POSITIVE ELEMENTS( H+))FORMS A NEUTRAL COMPOUND.HENCE USED FOR NEUTRALIZATION.
Hydroxide (OH-) has a negative charge because it has gained an extra electron, giving it a net negative charge of -1. This extra electron is acquired when a hydrogen ion (H+) is donated to the hydroxide ion as part of a chemical reaction.
Technically it is called water because the positive hydrogen ions and the negative hydroxide ions would attract to form a compound with two hydrogen molecules and one oxygen molecule. H2O. This occurs most often in acid-base neutralization reaction where water is a product of the reactions.
As calcium forms the 2+ ion, and hydroxide has a negative charge, the formula would be Ca(OH)2
A negative enthalpy of formation indicates that energy is evolved.
The negative ions of the salt come from the acid used in the neutralization reaction. When an acid reacts with a base, the hydrogen ions from the acid combine with the hydroxide ions from the base to form water, leaving behind the negative ions of the salt.
No, the enthalpy of formation can be positive, negative, or zero, depending on the specific chemical reaction and the substances involved.
A negative enthalpy in a chemical reaction indicates that the reaction is exothermic, meaning it releases heat energy to the surroundings.
Negtive
The hydroxide ion, OH-, has a negative charge of 1-.
When an acid is mixed with a hydroxide base, a neutralization reaction occurs resulting in the formation of water and a salt. The hydrogen ions from the acid combine with the hydroxide ions from the base to form water, while the positive and negative ions from the acid and base combine to form a salt.
Two things produced by neutralization are water and a salt. Water is formed as a result of the reaction between the hydrogen ions from an acid and the hydroxide ions from a base. A salt, which is an ionic compound, is formed when the positive ions from the base combine with the negative ions from the acid.
For a spontaneous reaction, the overall change in enthalpy should be negative (exothermic). This means that the products have a lower enthalpy than the reactants, releasing energy in the form of heat.
I think it is a positive charge!!
The reaction is exothermic, meaning it releases heat. The enthalpy of the reaction is negative, indicating that it is exothermic.
If you plot the reaction coordinate (what I think you mean by "enthalpy change diagram"), the reaction will be exothermic if the products are lower on the graph than the reactants. If they are higher than it is endothermic. For instance, if you go to the linked Wikipedia page (link to the left of this answer), the graph shown is of an exothermic reaction.