How many grams of CaCl2 are needed to produce 10.0 grams of NaCl?
If all the Cl goes into makeing CaCl2, then you have
molesNaCl=10/58.4
and then in CaCl2, you must have half of that, or
molesCaCl2=5/58.4
grams CaCl2=5/58.4 * 111
To find out how many grams of CaCl2 are needed to produce 10.0 grams of NaCl, you need to use the balanced chemical equation for the reaction.
The balanced equation for the reaction between CaCl2 and Na2CO3 is:
CaCl2 + Na2CO3 -> 2 NaCl + CaCO3
According to the balanced equation, one mole of CaCl2 produces 2 moles of NaCl. This means that the molar ratio between CaCl2 and NaCl is 1:2.
To calculate the grams of CaCl2 needed, you can follow these steps:
Step 1: Determine the molar mass of NaCl and CaCl2.
- The molar mass of NaCl is 58.44 g/mol (22.99 g/mol for sodium + 35.45 g/mol for chlorine).
- The molar mass of CaCl2 is 110.98 g/mol (40.08 g/mol for calcium + 2 * 35.45 g/mol for chlorine).
Step 2: Calculate the number of moles of NaCl.
- The given mass of NaCl is 10.0 grams.
- To find the number of moles, divide the mass by the molar mass: 10.0 g / 58.44 g/mol = 0.171 moles.
Step 3: Calculate the number of moles of CaCl2.
- Since the molar ratio between CaCl2 and NaCl is 1:2, the number of moles of CaCl2 is half (0.5) the moles of NaCl: 0.171 moles * 0.5 = 0.0855 moles.
Step 4: Convert moles to grams of CaCl2.
- Multiply the number of moles of CaCl2 by the molar mass: 0.0855 moles * 110.98 g/mol = 9.49 grams.
Therefore, you would need approximately 9.49 grams of CaCl2 to produce 10.0 grams of NaCl.