Question

How many ounces of 15-0-15 must be added to gallon of solution to give a final concentration of 100 ppm N ?

Answer 1

Step-by-step explanation:

To calculate the amount of 15-0-15 fertilizer needed to achieve a final concentration of 100 ppm (parts per million) nitrogen in a gallon of solution, you can use the following formula:

Amount of fertilizer (oz)

=

(

Target concentration (ppm)

×

Volume of solution (gallons)

Percentage of nitrogen in fertilizer

)

Amount of fertilizer (oz)=(

Percentage of nitrogen in fertilizer

Target concentration (ppm)×Volume of solution (gallons)

)

In this case, for 15-0-15 fertilizer, the percentage of nitrogen is 15. Substituting the values:

Amount of fertilizer (oz)

=

(

100

×

1

15

)

Amount of fertilizer (oz)=(

15

100×1

)

Amount of fertilizer (oz)

=

100

15

≈

6.67

 

oz

Amount of fertilizer (oz)=

15

100

≈6.67oz

So, approximately 6.67 ounces of 15-0-15 fertilizer should be added to a gallon of solution to achieve a final concentration of 100 ppm nitrogen.

Answer 2

To achieve 100 ppm N in a gallon of solution with 15-0-15 fertilizer, only 0.000089 ounces are needed.

Here's how to calculate the amount of 15-0-15 fertilizer needed:

1. Define the values: Nitrogen concentration in the fertilizer: 15% (0.15)

Desired final nitrogen concentration: 100 ppm (0.0001 g/mL)

Solution volume: 1 gallon (3.78541 L)

2. Calculate the amount of nitrogen needed: Nitrogen needed = desired concentration * solution volume

Nitrogen needed = 0.0001 g/mL * 3.78541 L

Nitrogen needed = 0.000378541 g

3. Calculate the amount of fertilizer needed: Amount of fertilizer = nitrogen needed / nitrogen concentration in fertilizer

Amount of fertilizer = 0.000378541 g / 0.15

Amount of fertilizer = 0.002523607 g

4. Convert grams to ounces: 1 ounce = 28.3495 g

Amount of fertilizer (ounces) = amount of fertilizer (grams) / conversion factor

Amount of fertilizer (ounces) = 0.002523607 g / 28.3495 g/oz

Amount of fertilizer (ounces) = 0.000089 ounces

Therefore, you need approximately 0.000089 ounces of 15-0-15 fertilizer to achieve a final concentration of 100 ppm N in a gallon of solution.