Section III. Milliequivalent per Liter (mEq/L) Solutions - Laboratory Mathematics

Custom Search

The calculated value of 26.5 g/L is now used as a factor to determine the
volume of solution that can be prepared. However, the reciprocal of the value must be
used as a factor. If there are 26.5 grams per liter then for every liter there are 26.5
grams of solute. This relationship is true of all factors we have used.
L
106.0 g X ------ = 4.00 L
26.5 g
Section III. MILLIEQUIVALENT PER LITER (mEq/L) SOLUTIONS
4-7.
INTRODUCTION
Milliequivalent per liter problems are based on the same principle as normality. If
we examine the definition of normality, we will find that a normal solution contains one
gram equivalent weight per liter of solution. Equivalently, we can say that a normal
solution is one equivalent per liter of solution (Eq/L). A milliequivalent per liter solution
would, therefore, contain one milliequivalent weight per liter of solution.
4-8.
DISCUSSION
a. A milliequivalent = 0.001 equivalent and 1 equivalent = 1000 milliequivalents.
b. A milliequivalent has the numerical value of one equivalent weight expressed
in mg/mEq.
c. To convert Eq/L to mEq/L and vice versa multiply the concentration by the
conversion factor 1000 mEq/1 Eq as appropriate.
4-9.
SOLVING MILLIEQUIVALENT PER LITER PROBLEMS
a. Example 1. How much NaCl is needed to prepare 500 mL of a 25.0 mEq/L
NaCl solution?
Solution. Read the problem carefully and determine the desired quantity.
Milligrams of NaCl.
Determine the milliequivalent weight of the compound.
NaCl
Na
23.0
C
+ 35.5
58.5 mg/mmol
MD0837
4-8

 Medical News Doctors urge meningitis shots for vulnerable infants, children(HealthDay)—Infants and children who are at risk of contracting meningitis...medicalxpress.comPreemies may have higher risk of blood clots, even as adults(HealthDay)—Babies born prematurely appear to have a slightly increased risk...medicalxpress.comTonsillectomy for sleep apnea may trigger weight gain(HealthDay)—Tonsillectomies are commonly done to relieve sleep apnea in children,...medicalxpress.comA closer look at new research showing disproportionate rates of melanoma in Marin CountyLast week, Cancer Prevention Institute of California/Stanford Cancer Institute researcher...scopeblog.stanford.eduEarly hormone therapy may be safe for women's hearts(HealthDay)—Healthy women at low risk of cardiovascular disease may be...medicalxpress.comType of lymphoma treatment impacts degree of harm to sperm(HealthDay)—Lymphoma treatment has damaging effects on spermatogenesis but, in most...medicalxpress.comAAP updates recommendations for meningococcal vaccines(HealthDay)—New recommendations are presented for meningococcal vaccination in a policy...medicalxpress.comDo Decision Aids Help Patients Make Difficult Choices? (CME/CE)(MedPage Today) -- Decision aids designed to help patients make...medpagetoday.comHuman brain has coping mechanism for dehydration(HealthDay)—Although dehydration significantly reduces blood flow to the brain, researchers...medicalxpress.comLow yield for repeat colonoscopy in some patients(HealthDay)—Repeat colonoscopies within 10 years are of little benefit to...medicalxpress.comTeen vaccinations up but HPV coverage remains low overall(HealthDay)—From 2012 to 2013, coverage for adolescents aged 13 to...medicalxpress.comNon-endoscopic migraine surgery provides significant symptom reliefA revised version of a surgical procedure to treat severe...medicalxpress.comElectronic screening tool to triage teenagers and risk of substance misuseAn electronic screening tool that starts with a single question...medicalxpress.comHealthy school lunches get thumbs up from students(HealthDay)—Elementary school students seem to be satisfied with the healthier...medicalxpress.comResearch letter examines pacemaker use in patients with cognitive impairmentDr. Nicole R. Fowler and her fellow reserachers have found...medicalxpress.comDementia patients more likely to get implanted pacemakers, study saysPeople with dementia are more likely to get implanted pacemakers...medicalxpress.comScientists discover genetic switch that can prevent peripheral vascular disease in miceMillions of people in the United States have a circulatory...medicalxpress.comForced mutations doom HIV: New study reveals how a potential HIV drug exacts its toll on viral populationsFifteen years ago, MIT professor John Essigmann and colleagues from...medicalxpress.comResearchers capture detailed three-dimensional images of cardiac dynamics in zebrafishThe stunning video above depicts a reconstructed beating heart of...scopeblog.stanford.eduGlucose 'control switch' in the brain key to both types of diabetesResearchers at Yale School of Medicine have pinpointed a mechanism...medicalxpress.com