Answer:
The answer is A a chemical bond is a bond between atoms that holds them together
Answer:
1500 mmol.
Explanation:
Hello,
In this case, for such monovalent potassium species, we can verify that 1 mEq equals 1 mmol, therefore, the required solution is shown below:
Which means that also 1500 mmol of monovalent potassium ions are contained in the liter.
Regards.
The NaOH can react with HCl with the formula: NaOH + HCl = NaCl + H2O. So if you want to neutralize the solution, the molar number of NaOH and NCl need to be equal. So we need 0.3*50/0.1=150 milliliters.
Answer:
There should be added 24.33g of EDTA
Explanation:
EDTA + Ca2+ → Ca(EDTA)
MM of EDTA = 292.24g/mole
MM of Ca2+ =40g/mole
An aqueos waste contains 20 mg/L Calcium, and collects the waste in 44 gallon drums.
The concentration of Ca2+ ions = 20mg/L = 0.02g/L
We know 1 gallon = 3.785L
The mass of calcium ions is in 44 gallons
⇒44 gallons = 3.785 * 44 = 166.54 L
Since the aqueous waste contains 0.02g/L calcium
in 44 gallons or 166.54 L ⇒ 166.54 * 0.02g = 3.308g
MM of Ca2+ = 40g/mole
⇒40g of Ca2+ reacts with 292.24g of EDTA
⇒ (292.24/40 ) * 3.308g = 24.33 g
There should be added 24.33g of EDTA