Question
Using moles to balance equations 1. Use the following masses of reactants and products to write balanced symbol equations. a) 237.0 g of sodium thiosulfate (Na_(2)S_(2)O_(3)) reacts with 109.5 g of hydrochloric acid to produce g of sodium chloride,48.0 g of sulfur 96.0 g of sulfur dioxide and 27.0 g of water.
Answer
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Saffron
Veteran · Tutor for 10 years
Answer
## Calculating Moles:### Sodium Thiosulfate (
):
### Hydrochloric Acid (
):
### Sodium Chloride (
):
### Sulfur (
):
### Sulfur Dioxide (
):
### Water (
):
## Balancing the equation: The balanced chemical equation is:###
## Validating the balance:From the chemical equation, we can always see that reactants and products from both sides are correctly balanced in mole ratios thus the equation must be a correct.Chemical reaction equation double checked is once again:###
Explanation
## Step1: Calculate the moles of each substance:Moles are the mass of a substance divided by its molar mass. Recall that the molar mass is the sum of the masses of all the elements in the compound.-Sodium thiosulfate (
)-Hydrochloric acid (
)-Sodium chloride (
)-Sulfur (
)-Sulfur dioxide (
)-Water (
)## Step2: Balance the equation using the moles found:Next, determine a balanced chemical equation that accounts for all reactants and produces all products in the measured amounts. ## Step3: Validate the equation balanced is correct:The last step would be to check if our balance equation is correct, by ensuring that both the moles of reactants and products are balanced correctly.