Working to find the xH2O in salt Taking that quantities of salt solution and acid are expressed in thousandths of a litre, it follows that mol of acid used = 0.0488 x 0.01 = 0.000488 From equation for reaction between acid and salt, Na2CO3 + 2HCl -----> 2NaCl + CO2 + H2O 2 mol of acid reacted with one mole of salt so, mol of salt used = 0.000488/2 = 0.000244 Mol of salt in 1l = 0.000244 x 1000/2.5 = 0.0976 Mass of salt in 1l = 0.0976 x 106g = 10.35g But mass of hydrated salt used was 27.82g So, mass of water in salt = 27.82 - 10.35g = 17.47g Mass ratio of salt to water is 10.35:17.47 Mole ratio of salt to water is 10.35/106:17.47/18 = 0.0976:0.971 or 1:10 dividing by smallest component of ratio therefore moles of water in hydrated salt = 10 Hence formula of salt is Na2CO3.10H2O
0.22 mol/ dm -3
5
Yes it do But don't forget that it don't react with the Copper only
Not normally. Hydrochloric acid will dissolve carbonates, so marble (calcium carbonate) would be dissolved but many rocks are impervious to acids.
There is no definite pH of hydrochloric acid or any other substance. pH is a measure of the concentration of hydrogen ions in a solution which depends on both how strong an acid or base is and how concentrated it is (how much is dissolved in a given volume of water). Because hydrochloric acid is a strong acid the pH can be calculated as the negative logarithm (base 10) of its molar concentration up to a pH of 7.
Generally this concentration is 36.5 %. However cocentrations up to just over 40% are possible but require special pressure and cool temperature conditions because the vapor pressure of the hydrogen chloride (which is dissolved into water to make hydrochloric acid) is high enough to cause evaporation of the hydrogen chloride out of the solution which then reduces the concentration unless you have the pressure and temperature conditions.
5
Yes it do But don't forget that it don't react with the Copper only
Not normally. Hydrochloric acid will dissolve carbonates, so marble (calcium carbonate) would be dissolved but many rocks are impervious to acids.
There is no definite pH of hydrochloric acid or any other substance. pH is a measure of the concentration of hydrogen ions in a solution which depends on both how strong an acid or base is and how concentrated it is (how much is dissolved in a given volume of water). Because hydrochloric acid is a strong acid the pH can be calculated as the negative logarithm (base 10) of its molar concentration up to a pH of 7.
The concentration of a substance dissolved in a liquid.
Generally this concentration is 36.5 %. However cocentrations up to just over 40% are possible but require special pressure and cool temperature conditions because the vapor pressure of the hydrogen chloride (which is dissolved into water to make hydrochloric acid) is high enough to cause evaporation of the hydrogen chloride out of the solution which then reduces the concentration unless you have the pressure and temperature conditions.
Hydrochloric.
Hydrochloric acid is hydrogen chloride dissolved in water.
isotonic
concentration gradient
mass
yes